Update README.md

README.md

@@ -63,3 +63,17 @@ configs:
     path: query.parquet
 license: cc-by-4.0
 ---
+
+
+## OK-VQA Image-Text to Text Retreival
+
+
+```
+@inproceedings{marino2019ok,
+  title={Ok-vqa: A visual question answering benchmark requiring external knowledge},
+  author={Marino, Kenneth and Rastegari, Mohammad and Farhadi, Ali and Mottaghi, Roozbeh},
+  booktitle={Proceedings of the IEEE/cvf conference on computer vision and pattern recognition},
+  pages={3195--3204},
+  year={2019}
+}
+```