Polar Embedding Ran Iwamoto author Ryosuke Kohita author Akifumi Wachi author 2021-11 text Proceedings of the 25th Conference on Computational Natural Language Learning Arianna Bisazza editor Omri Abend editor Association for Computational Linguistics Online conference publication iwamoto-etal-2021-polar 10.18653/v1/2021.conll-1.37 https://aclanthology.org/2021.conll-1.37/ 2021-11 470 480