Are formal restrictions on crossing dependencies epiphenominal?
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10427090" target="_blank" >RIV/00216208:11320/19:10427090 - isvavai.cz</a>
Výsledek na webu
<a href="https://www.aclweb.org/anthology/W19-7802" target="_blank" >https://www.aclweb.org/anthology/W19-7802</a>
DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Are formal restrictions on crossing dependencies epiphenominal?
Popis výsledku v původním jazyce
Characterizing the distribution of crossing dependencies in natural language dependency trees isa crucial task for building parsers and understanding the formal properties of human language. Anumber of formal restrictions on crossing dependencies have been proposed, including bounds ongap degree, edge degree, and end-point crossings. Here we ask whether the empirical distributionof crossing dependencies in dependency treebanks offers evidence for these formal restrictions astrue, independent constraints on dependency trees, or whether the distribution can be explainedusing other, more generic constraints affecting dependency trees. Specifically, we explore thenull hypothesis that crossing dependencies are formally unrestricted, but occur at a low rate.We implement the null hypothesis using random trees where crossing dependencies occur at thesame rate as in natural language trees, but without any formal restrictions. We find that thisbaseline generally does not reproduce the same distribution of gap degree, edge degree, endpoint-crossing, and heads’ depth difference as real trees, suggesting that these formal constraintsare a consequence of factors beyond the rate of crossing dependencies alone.
Název v anglickém jazyce
Are formal restrictions on crossing dependencies epiphenominal?
Popis výsledku anglicky
Characterizing the distribution of crossing dependencies in natural language dependency trees isa crucial task for building parsers and understanding the formal properties of human language. Anumber of formal restrictions on crossing dependencies have been proposed, including bounds ongap degree, edge degree, and end-point crossings. Here we ask whether the empirical distributionof crossing dependencies in dependency treebanks offers evidence for these formal restrictions astrue, independent constraints on dependency trees, or whether the distribution can be explainedusing other, more generic constraints affecting dependency trees. Specifically, we explore thenull hypothesis that crossing dependencies are formally unrestricted, but occur at a low rate.We implement the null hypothesis using random trees where crossing dependencies occur at thesame rate as in natural language trees, but without any formal restrictions. We find that thisbaseline generally does not reproduce the same distribution of gap degree, edge degree, endpoint-crossing, and heads’ depth difference as real trees, suggesting that these formal constraintsare a consequence of factors beyond the rate of crossing dependencies alone.
Klasifikace
Druh
O - Ostatní výsledky
CEP obor
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OECD FORD obor
10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
Návaznosti výsledku
Projekt
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Návaznosti
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Ostatní
Rok uplatnění
2019
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů