adding an external resource

resources/index.md

@@ -2,10 +2,16 @@
 layout: page
 title: SIGMathLing - Datasets and Resources
 ---
+## Resources hosted on the SIGMathLing Repository
  1. [arXMLiv corpus, 08.2017 release](/resources/arxmliv-dataset-082017/)
  2. [arXMLiv word embeddings, 08.2017 release](/resources/arxmliv-embeddings-082017)
  3. [quantity expressions](/resources/quantity-expressions)
  4. [arXMLiv corpus, 08.2018 release](/resources/arxmliv-dataset-082018/)
  5. [arXMLiv word embeddings, 08.2018 release](/resources/arxmliv-embeddings-082018)
+  
+ 
+## External Resources
+ 1.  [ACL-math-annotation](http://www-al.nii.ac.jp/acl-math-annotation/)
 
-Additional resources are en route, see the [plan](/technical/) for details.
+## Additional resources are en route
+see the [plan](/technical/) for details.