@inproceedings{clark2019what,
 author = {Kevin Clark and Urvashi Khandelwal and Omer Levy and Christopher D. Manning},
 booktitle = {BlackBoxNLP@ACL},
 title = {What Does BERT Look At? An Analysis of BERT's Attention},
 url = {https://nlp.stanford.edu/pubs/clark2019what.pdf},
 year = {2019}
}