Spandana Gella editor Johannes Welbl editor Marek Rei editor Fabio Petroni editor Patrick Lewis editor Emma Strubell editor Minjoon Seo editor Hannaneh Hajishirzi editor 2020-07 Association for Computational Linguistics Online text conference publication repl4nlp-2020-representation https://aclanthology.org/2020.repl4nlp-1.0/