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"text": "Universal Dependencies (UD) is a framework for cross-linguistically consistent treebank annotation that has so far been applied to over 100 languages (http://universaldependencies.org/). The framework is aiming to capture similarities as well as idiosyncrasies among typologically different languages (e.g., morphologically rich languages, pro-drop languages, and languages featuring clitic doubling). The goal in developing UD was not only to support comparative evaluation and cross-lingual learning but also to facilitate multilingual natural language processing and enable comparative linguistic studies.",
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"section": "Preface",
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"text": "The goal of the UD workshop is to bring together researchers working on UD, to reflect on the theory and practice of UD, its use in research and development, and its future goals and challenges.",
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"text": "The Fifth Workshop on Universal Dependencies (UDW 2021) is, like its third edition before, part of SyntaxFest, which co-locates four related but independent events: The reasons that suggested bringing these four events together in 2019 still hold in 2021. There is a continuing, strong interest in corpora and dependency treebanks for empirically validating syntactic theories, studying syntax from quantitative and theoretical points of view, and for training machine learning models for natural language processing. Much of this research is increasingly multilingual and crosslingual, made in no small part possible by the Universal Dependencies project, which continues to grow at currently nearly 200 treebanks in over 100 languages.",
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"text": "For these reasons and encouraged by the success of the first SyntaxFest, which was held in 2019 in Paris, we -the chairs of the four events -decided to bring them together again in 2021. Due to the vagaries of the COVID-19 pandemic, it was eventually decided to push the actual SyntaxFest 2021 back to March 2022. In order not to delay the publication of new research and not to conflict with other events, we decided however to publish the proceedings that you are now reading in advance, in December 2021.",
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"section": "Preface",
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"text": "As in 2019, we organized a single reviewing process for the whole SyntaxFest, with identical paper formats for all four events. Authors could indicate (multiple) venue preferences, but the assignment of papers to events for accepted papers was made by the program chairs.",
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"text": "38 long papers were submitted, 25 to Depling, 11 to Quasy, 17 to TLT, and 24 to UDW. The program chairs accepted 30 (79%) and assigned 8 to Depling, 5 to Quasy, 7 to TLT, and 10 to UDW. 22 short papers were submitted, 6 to Depling, 7 to Quasy, 9 to TLT, and 9 to UDW. The program chairs accepted 14 (64%) and assigned 3 to Depling, 3 to Quasy, 3 to TLT, and 5 to UDW.",
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"text": "At the time of this writing, we do not yet know whether SyntaxFest will be a hybrid or purely online event. We regret this uncertainty but are nevertheless looking forward to it very much. Our sincere thanks go to everyone who is making this event possible, including everybody who submitted their papers, and of course the reviewers for their time and their valuable comments and suggestions. We would like to thank Djam\u00e9 Seddah, whose assistance and expertise in organizing SyntaxFests was invaluable. Finally, we would also like to thank ACL SIGPARSE for its endorsement and the ACL Anthology for publishing the proceedings. Program co-chairs",
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"text": "The chairs for each event (and co-chairs for the single SyntaxFest reviewing process) are:",
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"text": "\u2022 Depling:",
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"text": "-Nicolas Mazziotta (Universit\u00e9 de Li\u00e8ge)",
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"text": "-Simon Mille (Universitat Pompeu Fabra)",
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"text": "\u2022 Quasy:",
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"text": "-Radek\u010cech (University of Ostrava)",
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{
"text": "-Xinying Chen (Xi'an Jiaotong University)",
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"text": "\u2022 TLT:",
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"text": "-Daniel Dakota (Indiana University)",
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{
"text": "-Kilian Evang (Heinrich Heine University D\u00fcsseldorf)",
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"text": "-Sandra K\u00fcbler (Indiana University)",
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"text": "\u2022 UDW:",
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{
"text": "- ",
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"text": "Chiara Alzetta (National Research Council of Italy) Aditya Bhargava (University of Toronto) Lauren Cassidy (Dublin City University) Simon Petitjean (Heinrich Heine University D\u00fcsseldorf) Xenia Petukhova (National Research University Higher School of Economics) Daniel Swanson (Indiana University) He Zhou (Indiana University) Yulia Zinova (Heinrich Heine University D\u00fcsseldorf)",
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"section": "Additional Reviewers",
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"title": "Prokopis Prokopidis (Institute for Language and Speech Processing",
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"content": "
Petya Osenova, Kiril Simov (local organizers and co-chairs)