diff --git a/13-looking-up-data.html b/13-looking-up-data.html
index 4ad35736..42743c0e 100644
--- a/13-looking-up-data.html
+++ b/13-looking-up-data.html
@@ -515,8 +515,8 @@ <h3 class="callout-title">Retrieving journal details from CrossRef via
 OpenRefine) which can use linked data sources for reconciliation. The
 RDF extension by Stuart Kenny can be downloaded from <a href="https://github.com/stkenny/grefine-rdf-extension/releases" class="external-link">https://github.com/stkenny/grefine-rdf-extension/releases</a>.</p>
 <p>Other extensions are available to do reconciliation against local
-data such as csv files (see <a href="https://okfnlabs.org/reconcile-csv/" class="external-link">http://okfnlabs.org/reconcile-csv/</a>)
-and maintained lists of values (see <a href="https://okfnlabs.org/projects/nomenklatura/index.html" class="external-link">http://okfnlabs.org/projects/nomenklatura/index.html</a>).</p>
+data such as csv files (see <a href="https://github.com/rufuspollock-okfn/reconcile-csv" class="external-link">https://github.com/rufuspollock-okfn/reconcile-csv</a>)
+and maintained lists of values (see <a href="https://github.com/opensanctions/nomenklatura" class="external-link">https://github.com/opensanctions/nomenklatura</a>).</p>
 <p>For more information on using Reconciliation services see <a href="https://docs.openrefine.org/manual/reconciling" class="external-link">https://docs.openrefine.org/manual/reconciling</a>.</p>
 <div id="reconcile-publisher-names-with-viaf-ids" class="callout discussion">
 <div class="callout-square">
diff --git a/aio.html b/aio.html
index f78c800f..128f9dce 100644
--- a/aio.html
+++ b/aio.html
@@ -2736,8 +2736,8 @@ <h3 class="callout-title">Retrieving journal details from CrossRef via
 OpenRefine) which can use linked data sources for reconciliation. The
 RDF extension by Stuart Kenny can be downloaded from <a href="https://github.com/stkenny/grefine-rdf-extension/releases" class="external-link">https://github.com/stkenny/grefine-rdf-extension/releases</a>.</p>
 <p>Other extensions are available to do reconciliation against local
-data such as csv files (see <a href="https://okfnlabs.org/reconcile-csv/" class="external-link">http://okfnlabs.org/reconcile-csv/</a>)
-and maintained lists of values (see <a href="https://okfnlabs.org/projects/nomenklatura/index.html" class="external-link">http://okfnlabs.org/projects/nomenklatura/index.html</a>).</p>
+data such as csv files (see <a href="https://github.com/rufuspollock-okfn/reconcile-csv" class="external-link">https://github.com/rufuspollock-okfn/reconcile-csv</a>)
+and maintained lists of values (see <a href="https://github.com/opensanctions/nomenklatura" class="external-link">https://github.com/opensanctions/nomenklatura</a>).</p>
 <p>For more information on using Reconciliation services see <a href="https://docs.openrefine.org/manual/reconciling" class="external-link">https://docs.openrefine.org/manual/reconciling</a>.</p>
 <div id="reconcile-publisher-names-with-viaf-ids" class="callout discussion">
 <div class="callout-square">
diff --git a/instructor/02-importing-data.html b/instructor/02-importing-data.html
index 0f870168..3b1fdf42 100644
--- a/instructor/02-importing-data.html
+++ b/instructor/02-importing-data.html
@@ -452,7 +452,7 @@ <h3 class="callout-title">Create your first OpenRefine project (using
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Instructor Note</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>This is a good moment to review the points from <a href="01-introduction.html#what-should-i-know-when-working-with-openrefine">What
 Should I Know When Working with OpenRefine?</a></p>
@@ -485,7 +485,7 @@ <h3 id="going-further">Going Further<a class="anchor" aria-label="anchor" href="
   <h3 class="accordion-header" id="headingInstructor2">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Instructor Note</h3>
 </button>
-<div id="collapseInstructor2" class="accordion-collapse collapse" aria-labelledby="headingInstructor2" data-bs-parent="#accordionInstructor2">
+<div id="collapseInstructor2" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor2" aria-labelledby="headingInstructor2">
 <div class="accordion-body">
 <p>Carefully guide learners on how to revisit OpenRefine’s homepage to
 explore import options when creating new or re-opening existing
diff --git a/instructor/06-working-with-columns.html b/instructor/06-working-with-columns.html
index 43e0c030..c74b0d90 100644
--- a/instructor/06-working-with-columns.html
+++ b/instructor/06-working-with-columns.html
@@ -402,7 +402,7 @@ <h3 class="card-title">Objectives</h3>
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Sorting and Reorder Rows Permanently</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
 <div class="accordion-body">
 <p>Do not rush these last two sentences. Repeat them slowly after a
 pause and allow learners to explore how sorting works for a moment.</p>
diff --git a/instructor/13-looking-up-data.html b/instructor/13-looking-up-data.html
index d1a7b87e..e2b5a5dd 100644
--- a/instructor/13-looking-up-data.html
+++ b/instructor/13-looking-up-data.html
@@ -517,8 +517,8 @@ <h3 class="callout-title">Retrieving journal details from CrossRef via
 OpenRefine) which can use linked data sources for reconciliation. The
 RDF extension by Stuart Kenny can be downloaded from <a href="https://github.com/stkenny/grefine-rdf-extension/releases" class="external-link">https://github.com/stkenny/grefine-rdf-extension/releases</a>.</p>
 <p>Other extensions are available to do reconciliation against local
-data such as csv files (see <a href="https://okfnlabs.org/reconcile-csv/" class="external-link">http://okfnlabs.org/reconcile-csv/</a>)
-and maintained lists of values (see <a href="https://okfnlabs.org/projects/nomenklatura/index.html" class="external-link">http://okfnlabs.org/projects/nomenklatura/index.html</a>).</p>
+data such as csv files (see <a href="https://github.com/rufuspollock-okfn/reconcile-csv" class="external-link">https://github.com/rufuspollock-okfn/reconcile-csv</a>)
+and maintained lists of values (see <a href="https://github.com/opensanctions/nomenklatura" class="external-link">https://github.com/opensanctions/nomenklatura</a>).</p>
 <p>For more information on using Reconciliation services see <a href="https://docs.openrefine.org/manual/reconciling" class="external-link">https://docs.openrefine.org/manual/reconciling</a>.</p>
 <div id="reconcile-publisher-names-with-viaf-ids" class="callout discussion">
 <div class="callout-square">
diff --git a/instructor/aio.html b/instructor/aio.html
index b74a76d6..0feac7b5 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -795,7 +795,7 @@ <h3 class="callout-title">Create your first OpenRefine project (using
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Instructor Note</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>This is a good moment to review the points from <a href="01-introduction.html#what-should-i-know-when-working-with-openrefine">What
 Should I Know When Working with OpenRefine?</a></p>
@@ -833,7 +833,7 @@ <h3 id="going-further">Going Further<a class="anchor" aria-label="anchor" href="
   <h3 class="accordion-header" id="headingInstructor2">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Instructor Note</h3>
 </button>
-<div id="collapseInstructor2" class="accordion-collapse collapse" aria-labelledby="headingInstructor2" data-bs-parent="#accordionInstructor2">
+<div id="collapseInstructor2" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor2" aria-labelledby="headingInstructor2">
 <div class="accordion-body">
 <p>Carefully guide learners on how to revisit OpenRefine’s homepage to
 explore import options when creating new or re-opening existing
@@ -1650,7 +1650,7 @@ <h3 class="card-title">Objectives</h3>
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Sorting and Reorder Rows Permanently</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
 <div class="accordion-body">
 <p>Do not rush these last two sentences. Repeat them slowly after a
 pause and allow learners to explore how sorting works for a moment.</p>
@@ -2829,8 +2829,8 @@ <h3 class="callout-title">Retrieving journal details from CrossRef via
 OpenRefine) which can use linked data sources for reconciliation. The
 RDF extension by Stuart Kenny can be downloaded from <a href="https://github.com/stkenny/grefine-rdf-extension/releases" class="external-link">https://github.com/stkenny/grefine-rdf-extension/releases</a>.</p>
 <p>Other extensions are available to do reconciliation against local
-data such as csv files (see <a href="https://okfnlabs.org/reconcile-csv/" class="external-link">http://okfnlabs.org/reconcile-csv/</a>)
-and maintained lists of values (see <a href="https://okfnlabs.org/projects/nomenklatura/index.html" class="external-link">http://okfnlabs.org/projects/nomenklatura/index.html</a>).</p>
+data such as csv files (see <a href="https://github.com/rufuspollock-okfn/reconcile-csv" class="external-link">https://github.com/rufuspollock-okfn/reconcile-csv</a>)
+and maintained lists of values (see <a href="https://github.com/opensanctions/nomenklatura" class="external-link">https://github.com/opensanctions/nomenklatura</a>).</p>
 <p>For more information on using Reconciliation services see <a href="https://docs.openrefine.org/manual/reconciling" class="external-link">https://docs.openrefine.org/manual/reconciling</a>.</p>
 <div id="reconcile-publisher-names-with-viaf-ids" class="callout discussion">
 <div class="callout-square">
diff --git a/md5sum.txt b/md5sum.txt
index 584baf74..5ef8baa3 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -15,7 +15,7 @@
 "episodes/10-data-transformation.md" "47399b9f87a7c2dfae1d6b67eea71cc7" "site/built/10-data-transformation.md" "2023-05-26"
 "episodes/11-using-arrays-transformations.md" "e115138dcb3c916bcaf5634600e594c4" "site/built/11-using-arrays-transformations.md" "2024-01-09"
 "episodes/12-export-transformation.md" "aa6dd576a893a0870baa24611573e50b" "site/built/12-export-transformation.md" "2023-05-01"
-"episodes/13-looking-up-data.md" "4836a684fdebc498516367130e729746" "site/built/13-looking-up-data.md" "2024-05-08"
+"episodes/13-looking-up-data.md" "78395aeacd84ded698a0645d74ac2d48" "site/built/13-looking-up-data.md" "2024-05-08"
 "instructors/instructor-notes.md" "c2dfd88f1e85cccb9cbe872530c534ac" "site/built/instructor-notes.md" "2023-11-21"
 "learners/discuss.md" "60c724559d15d89fc50c5418d87f9628" "site/built/discuss.md" "2023-10-20"
 "learners/reference.md" "be4b8a891809c85a625fff879855921a" "site/built/reference.md" "2023-05-01"
diff --git a/pkgdown.yml b/pkgdown.yml
index b57d9b8e..6ef29ae5 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,5 +2,5 @@ pandoc: 3.1.11
 pkgdown: 2.0.9
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-05-08T17:34Z
+last_built: 2024-05-08T17:41Z