# Proceedings of the 17th International Conference on Parsing Technologies and the IWPT 2021 Shared Task on Parsing into Enhanced Universal Dependencies (IWPT 2021)

Authors: Christoph Bloomberg, Antoine Venant, Aditya Bhargava, Gerald Penn, Kong Zenodo, Sam Paszke, F. Gross, A. Massa, James Lerer, Gregory Bradbury, Trevor Chanan, Zeming Killeen, Natalia Lin, Gimelshein, Takuya Akiba, Shotaro Sano, Toshihiko Yanase, Takeru Ohta, Masanori Koyama, J. Baker, J. Bergstra, R. Bardenet, Y. Bengio, Balzs Kgl, Aditya Bhargava, Gerald Penn, S. Clark, James R. Curran, Zi-Hang Dai, Zhi-Lin Yang, Yi-Ming Yang, J. Carbonell, Q. Le, R. Salakhutdinov, A. Timothy, Fowler, Aymen Gannouni, V. Samsonov, Mohamed Behery, Tobias Meisen, Gerhard Lakemeyer, Justin Gilmer, S. Schoenholz, Patrick F. Riley, O. Vinyals, G. Dahl, J. Girard, Steven Gold, Anand Rangarajan, Kevin Jamieson, A. Talwalkar, Zohar S. Karnin, Tomer Koren, Oren Somekh, P. Diederik, Jimmy Kingma, Ba, Konstantinos Kogkalidis, M. Moortgat, Tejaswini Deoskar, Chris Alberti, David Weiss, Gregory Coppola, Slav Petrov, John C. Duchi, Elad Hazan, Y. Singer, Yoav Goldberg, Joakim Nivre, Jun Hatori, Takuya Matsuzaki, Yusuke Miyao, Jun'ichi Tsujii, M. Honnibal, Mark Johnson, Frank Keller, E. Kiperwasser, Philipp Koehn, Shuhei Kurita, Daisuke Kawahara, S. Kurohashi, Jason Lee, David Naradowsky, Smith, Zheng-Hua Li, Min Zhang, Wanxiang Che, Ting Liu, Wen-Liang Chen, Hai-Zhou Li, W. George, Keith Mcconkie, Rayner, Alexis Nasr, C. Ramisch, José Deulofeu, A. Valli, Q. Dat, Karin Nguyen, Verspoor, J. Pennington, R. Socher, Christopher D. Manning, M. Popel, Zdenk Abokrtsk, Martin Vojtek, Tahira Hui Wan, Y. Naseem, V. Lee, M. Castelli, Ballesteros, Hiroyasu Yamada, Yuji Matsumoto, Hang Yan, Xi-Peng Qiu, Xuanjing Huang, Jonathan Berant, A. Chou, R. Frostig, Percy Liang, Shuai-Chen Chang, Peng-Fei Liu, Yun Tang, Jing Huang, Xiao-Dong He, Bo Zhou, Li Dong, Mirella Lapata, Jia-Qi Guo, Ze-Cheng Zhan, Yan Gao, Yan Xiao, Jian-Guang Lou, Dong-Mei Zhang, Jonathan Herzig, Omri Abend, A. Rappoport, S. Yerushalmi, L. Banarescu, C. Bonial, S. Cai, M. Georgescu, K. Griffitt, U. Hermjakob, K. Knight, Martha Palmer, Nathan Schneider, Emily M. Bender, D. Flickinger, S. Oepen, Yi Zhang, Alexander Koller, Alena Bhmov, Jan Haji, Eva Hajiov, Barbora Hladk, Long-Xu Dou, Yang Xu, Yuxuan Wang, Yijia Liu, Pengxiang Cheng, K. Erk, C. Chiarcos, Niko Schenk, Jacob T. Cohen, Ruixiang Cui, Daniel Hershcovich, Yanai Elazar, Matt Gardner, J. Grus, Mark Neumann, O. Tafjord, Pradeep Dasigi, Nelson F. Liu, M. Peters, Michael Schmitz, Luke Zettlemoyer, Matthew S. Gerber, Joyce Chai, Adele E. Goldberg, Jarmila Panevov, P. Sgall, O. Bojar, Silvie Cinkov, Eva Fukov, Marie Mikulov, P. Pajas, J. Popelka, Ji Semeck, Jana Indlerov, Jan Tpnek, J. Toman, Z. Ureov, Zohar Aizenbud, Leshem Choshen, Elior Sulem, Brian McMahan, Matthew Stone, Adam Meyers, Ruth Reeves, C. Macleod, R. Szekely, Veronika Zielinska, B. Young, R. Grishman, Lasha Abzianidze, Johan Bos, Jan Hajic, Bin Li, Tim 'gorman, N. Xue, Daniel Zeman, Marco Kuhlmann, O. Tim, Nianwen Gorman, J.-X. Xue, M.-Y. Chun, Z. Straka, Uresova, Jan Lnning, Jakob Prange, James Pustejovsky, Ke-Cheng Lai, Ina Rösiger, Arndt Riester, Jonas Kuhn, Michael Roth, A. Frank, Josef Ruppenhofer, Laura A. Michaelis, C. Sporleder, R. Morante, Collin F. Baker, Kenji Sagae, A. Lavie, Ferdinand De, Saussüre, Jena Hwang, Vivek Srikumar, Austin Blodgett, Sarah Moeller, A. Stern, Adi Bitan, Adi Shalev, Carina Silberer, Eljko Agi, Anders Johannsen, Barbara Plank, Martnez Hctor, N. Alonso, A. Schluter, Sgaard, Mark Anderson, Carlos Gmez-Rodrguez, Jason Baldridge, Alexis Palmer, Dipanjan Das, Yan Miryam De Lhoneux, Alex Shao, Eliyahu Basirat, Sara Kiperwasser, Yoav Stymne, J. Goldberg, Nivre, Mathieu Dehouck, Timothy Dozat, Peng Qi, K. Ganchev, Jennifer Gillenwater, B. Taskar, Dan Garrette, Jason Mielens, R. Hwa, P. Resnik, A. Weinberg, Clara I. Cabezas, O. Kolak, Anders Sgaard, Katharina Kann, O. Lacroix, Ryan T. McDonald, Keith B. Hall, Oscar Tckstrm, Ryan T. McDonald, Jrg Tiedemann, Clara Vania, Yova Kementchedjhieva, A. Lopez, W. Ammar, George Mulcaire, Miguel Ballesteros, Chris Dyer, Noah A. Smith, Ekaterina Aplonova, F. Tyers, Danqi Chen, Denis Creissels, C. Bamba, Dione, M. Cheikh, Dione Bamba, W. Ling, A. Matthews, Jiang Guo, D. Yarowsky, Haifeng Wang, Languages, Adhiguna Kuncoro, Lingpeng Kong, Graham Neubig, Kyungtae Lim, N. Partanen, T. Poibeau, F. Pereira, Kiril Ribarov, Fallou Ngom, Marie-Catherine de Marneffe, F. Ginter, S. Pyysalo, N. Silveira, Reut Tsarfaty, O. Abimbola, Ogundepo, S. Robert, Aaron Smith, Bernd Bohnet, Miryam de Lhoneux, Yan Shao, Sara Stymne, M. Straka, J. Strakov, David Vilares, M. Alonso, Isabelle Augenstein, Adrian Benton, Margaret Mitchell, Dirk Hovy, Joachim Bingel, Richard Caruana, Alessandra Teresa Cignarella, C. Bosco, Paolo Rosso, J. Devlin, M. Chang, Kenton Lee, K. Toutanova, Long Duong, Trevor Cohn, Steven Bird, Paul Cook, R. French, Daniel Fried, Nikita Kitaev, D. Klein, Han Guo, Ramakanth Pasunuru, Mohit Bansal, Michelle Guo, Albert Haque, Dean, Se-Gui Huang, Lik-Chi Yeung, Feifei, Richard Johansson, Yvonne Adesam, Vidur Joshi, Mark Hopkins, Yash Kankanampati, Joseph Le Roux, Nadi Tomeh, Dima Taji, N. Habash, A. Kendall, Yarin Gal, Roberto Cipolla, Steven Cao, Giwoong Lee, E. Yang, S. Hwang, Hae Beom, Lee, Johannes Miryam De Lhoneux, Isabelle Bjerva, Anders Augenstein, Ying Li, Xue Peng, Rui Wang, Luo Si, Jia-Chen Liang, Zi-Qian Liu, Jia-Yu Zhou, Xiao-Qian Jiang, Chang Y. H. N. Zhang, Fei Wang, Sheng Liu, Ying-Yu Liang, A. Gitter, Minh-Thang Luong, I. Sutskever, L. Kaiser, Louis Martin, Benjamin Muller, Pedro, J. Surez, Yoann Dupont, Laurent Romary, Ric De La Clergerie, Djamé Seddah, Benot Sagot, H. Martnez, Alonso, Sara Meftah, N. Semmar, Mohamed Tahiri, Y. Tamaazousti, H. Essafi, Fatiha Sadat, Sebastian Schuster, Nanyun Peng, Mark Dredze, Ines Rehbein, Bich-Ngoc Do, Sebastian Ruder, M. Sanguinetti, A. Lavelli, A. Mazzei, Oronzo Antonelli, Fabio Tamburini, Zeeshan Ali, Sayyed, D. Dakota, F. Schrder, C. Biemann, Claudia Schulz, S. Eger, Johannes Daxenberger, Tobias Kahse, I. Gurevych, Jean Sbastien, Orhan Firat, Melvin Johnson, Genta Indra Winata, Andrea Madotto, Chien-Sheng Wu, Pascale Fung, Sen Wu, Hong-Yan Zhang, R. Christopher, Jesse Zeman, M. Haji, Milan Potthast, Filip Straka, Joakim Ginter, Slav Nivre, Petrov, Yu Zhang, Yuan Zhang, Paolo Baldi, Andrew A. Brown, G. Hinton, Bo Zheng, Caio Corro, Ivan Titov, Rotem Dror, Gili Baumer, Segev Shlomov, R. Reichart, Jason M. Eisner, Agnieszka Falenska, E. Fonseca, F. Andr, Martins, Victoria Fossum, Vaibhava Goel, William Byrne, Nathan David Green, M. Ciaramita, M. Mart, Llus Mrquez, S. Pad, Pavel Strak, M. Surdeanu, S. Hochreiter, J. Schmidhuber, Robert B. Jacobs, Michael I. Jordan, S. Nowlan, Tao Ji, Yuan-Bin Wu, Man Lan, Yoona Kim, Alexander M. Rush, Guillaume Lample, Sandeep Subramanian, Kazuya Kawakami, A. Rozenknop, M. Lacroix, Sheng Li, Z. Li, Hai Zhao
Venue: preprint (2021)

## Abstract
When learned without exploration, local models for structured prediction tasks are subject to exposure bias and cannot be trained without detailed guidance. Active Imitation Learning (AIL), also known in NLP as Dynamic Oracle Learning, is a general technique for working around these issues by allowing the exploration of different outputs at training time.

## Links
- DOI: https://doi.org/10.18653/v1/2021.iwpt-1
- Semantic Scholar: https://www.semanticscholar.org/paper/243183604