diff --git a/research/index.md b/research/index.md
index f95448e3c2a2076f1112a4f9520aef72377e97c5..9a78acc7041d3070277c57d7b0284d31b8831150 100644
--- a/research/index.md
+++ b/research/index.md
@@ -54,8 +54,7 @@ hidden: true
       <li><a href="/projects/arXMLiv/">LaTeX --&gt; XML</a></li>
       <li><a href="/systems/sTeX/">sTeX: Semantic LaTeX</a></li>
       <li>Context-Aware IDEs</li>
-      <li>Mathematical <a href="http://gl.mathhub.info">Corpora</a> and <a
-  href="sigmathling.kwarc.info>data sets></li>
+      <li>Mathematical <a href="http://gl.mathhub.info">Corpora</a> and <a href="sigmathling.kwarc.info">data sets</a></li>
       <li><a href="/projects/comma/">Linguistics of Math</a></li>
     </ul>
       </td>