%0 Conference Paper %B AAAI Conference on Artificial Intelligence (AAAI) %D 2021 %T Actionbert: leveraging user actions for semantic understanding of user interfaces %A He, Zecheng %A Sunkara, Srinivas %A Zang, Xiaoxue %A Xu, Ying %A Liu, Lijuan %A Wichers, Nevan %A Schubiner, Gabriel %A Lee, Ruby %A Chen, Jindong