Update README.md

README.md

@@ -50,3 +50,14 @@ for entity in entities:
 
 
 
+## Citation
+```
+@misc{bogdanov2024nuner,
+      title={NuNER: Entity Recognition Encoder Pre-training via LLM-Annotated Data}, 
+      author={Sergei Bogdanov and Alexandre Constantin and Timothée Bernard and Benoit Crabbé and Etienne Bernard},
+      year={2024},
+      eprint={2402.15343},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL}
+}
+```