add ref, license

README.md

@@ -7,7 +7,7 @@ languages:
 - de
 - fr
 licenses:
-- cc-by-4.0
+- mit
 multilinguality:
 - multilingual
 pretty_name: X-Stance
@@ -51,7 +51,7 @@ task_ids:
 ## Dataset Description
 
 - **Repository:** [https://github.com/ZurichNLP/xstance](https://github.com/ZurichNLP/xstance)
-- **Paper:** [http://ceur-ws.org/Vol-2624/paper9.pdf](http://ceur-ws.org/Vol-2624/paper9.pdf)
+- **Paper:** [http://ceur-ws.org/Vol-2624/paper9.pdf](http://ceur-ws.org/Vol-2624/paper9.pdf), [https://arxiv.org/abs/2003.08385](https://arxiv.org/abs/2003.08385)
 - **Point of Contact:**
 
 ### Dataset Summary
@@ -149,12 +149,19 @@ German, French/Italian
 
 ### Licensing Information
 
-[More Information Needed]
+[MIT License](https://github.com/ZurichNLP/xstance/blob/master/LICENSE)
 
 ### Citation Information
 
-[More Information Needed]
+```
+@article{vamvas2020x,
+  title={X-stance: A multilingual multi-target dataset for stance detection},
+  author={Vamvas, Jannis and Sennrich, Rico},
+  journal={arXiv preprint arXiv:2003.08385},
+  year={2020}
+}
+```
 
 ### Contributions
 
-Thanks to [@github-username](https://github.com/<github-username>) for adding this dataset.
+Thanks to [mkonxd](https://github.com/mkonxd) for adding this dataset.