update citation

offenseval_2020.py

@@ -26,6 +26,26 @@ logger = datasets.logging.get_logger(__name__)
 
 
 _CITATION = """\
+@inproceedings{zampieri-etal-2020-semeval,
+    title = "{S}em{E}val-2020 Task 12: Multilingual Offensive Language Identification in Social Media ({O}ffens{E}val 2020)",
+    author = {Zampieri, Marcos  and
+      Nakov, Preslav  and
+      Rosenthal, Sara  and
+      Atanasova, Pepa  and
+      Karadzhov, Georgi  and
+      Mubarak, Hamdy  and
+      Derczynski, Leon  and
+      Pitenis, Zeses  and
+      Coltekin, Cagri,
+    booktitle = "Proceedings of the Fourteenth Workshop on Semantic Evaluation",
+    month = dec,
+    year = "2020",
+    address = "Barcelona (online)",
+    publisher = "International Committee for Computational Linguistics",
+    url = "https://aclanthology.org/2020.semeval-1.188",
+    doi = "10.18653/v1/2020.semeval-1.188",
+    pages = "1425--1447",
+}
 """
 
 _DESCRIPTION = """\