Universal Dependencies - English Dependency Treebank Universal Dependencies English Web Treebank v2.12 -- 2023-05-15 https://github.com/UniversalDependencies/UD_English-EWT
Summary
A Gold Standard Universal Dependencies Corpus for English, built over the source material of the English Web Treebank LDC2012T13 (https://catalog.ldc.upenn.edu/LDC2012T13).
Introduction
The corpus comprises 254,825 words and 16,621 sentences, taken from five genres of web media: weblogs, newsgroups, emails, reviews, and Yahoo! answers. See the LDC2012T13 documentation for more details on the sources of the sentences. The trees were automatically converted into Stanford Dependencies and then hand-corrected to Universal Dependencies. All the basic dependency annotations have been single-annotated, a limited portion of them have been double-annotated, and subsequent correction has been done to improve consistency. Other aspects of the treebank, such as Universal POS, features and enhanced dependencies, has mainly been done automatically, with very limited hand-correction.
License/Copyright
Universal Dependencies English Web Treebank annotations © 2013-2021 by The Board of Trustees of The Leland Stanford Junior University. All Rights Reserved.
The annotations and database rights of the Universal Dependencies English Web Treebank are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
You should have received a copy of the license along with this work. If not, see http://creativecommons.org/licenses/by-sa/4.0/.
The underlying texts come from various sources collected for the LDC English Web Treebank. Some parts are in the public domain. Portions may be © 2012 Google Inc., © 2011 Yahoo! Inc., © 2012 Trustees of the University of Pennsylvania and/or © other original authors.
Structure
This directory contains a corpus of sentences annotated using Universal Dependencies annotation. The corpus comprises 254,825 words and 16,621 sentences, taken from various web media including weblogs, newsgroups, emails, reviews, and Yahoo! answers; see the LDC2012T13 documentation for more details on the source of the sentences. The trees were automatically converted into Stanford Dependencies and then hand-corrected to Universal Dependencies. All the dependency annotations have been single-annotated, and a limited portion of them have been double-annotated with interannotator agreement at approximately 96%. The sentence IDs include the genre and the filename of the original LDC2012T13 filename.
This corpus is compatible with the CoNLL-U format defined for Universal Dependencies. See:
http://universaldependencies.github.io/docs/format.html
The dependency taxonomy can be found on the Universal Dependencies web site:
http://www.universaldependencies.org
For the conversion to v2, we performed an automatic conversion with extensive spot-checking, and manual adjudication of ambiguous cases.
The enhanced dependencies were automatically obtained by running an adapted version of the converter by Schuster and Manning (2016). These dependencies have not been manually checked.
Deviations from UD
Version 2.12 of the English UD treebank conforms to the UD guidelines in almost all respects, but there remain the following deviations:
- The UD dependency
flatis largely only used for person names. - Dates are not annotated consistently.
Changelog
2023-05-15 v2.12
Highlights:
- Implement new policy on sole
iobj(#55) - Cleanup of free relatives (part of #278)
- Make use of
xcompmore consistent - For "etc.", change
Number=SingtoNumber=Plur
2022-11-15 v2.11
Highlights:
- Implement
:outerper multiple subjects policy (#310) - Implement
advcl:relcl(#346) - Implement revised guidelines for English pronouns (lemmas, features) (issue)
- Revise WH-adverbs to attach in a subordinate clause as
advmodnotmark(#88) - Improved lemmas/features for numeric values/entities
- Tag "etc." as
NOUN(#353) - Add neaten.py, which implements English-specific validation rules
2022-05-15 v2.10
Highlights:
- Fixed all validation errors
- Implement new
goeswithpolicy (#314) - Use
parataxisfor "X so Y" and similar (#313)
2021-11-15 v2.9
- Fixed all validation errors
- Many other improvements to annotation of assorted words and constructions
2021-05-15 v2.8
- Fixed many wrong lemmata, POS tags, and relations
- Reanalyzed many dependencies to conform to UD validation
- Retagged words in names to limit PROPN to true nouns
- Fixed certain metadata issues
- Fixed some typos, added CorrectForms
- Added missing multiword tokens for clitics/contractions
- Added Style=Expr feature for expressive spellings
- Fixed many incorrectly non-projective graphs, reanalyzing as projective
- Reannotated list items as NUM not X
2020-11-15 v2.7
- Added multiword tokens where appropriate for contracted verb forms
- Fixed some wrong lemmata and POS tags
2020-05-15 v2.6
- Added paragraph boundaries
- Fixed some wrong lemmata and POS tags
- Fixed directionality of some
goeswithdependencies
2019-11-15 v2.5
- Fixed miscellaneous syntactic issues
- Fixed CoNLL-U syntax error
2019-05-15 v2.4
- Fixed some wrong lemmata and POS tags
- Fixed miscellaneous syntactic issues
- Fixed some punctuation attachments
- Fixed malformed enhanced graphs
2018-11-15 v2.3
- Fixed several lemmata
2018-04-15 v2.2
- Repository renamed from UD_English to UD_English-EWT
- Automatically added enhanced dependencies (These have not been manually checked!)
- Fixed some wrong lemmata and POS tags
- Fixed miscellaneous syntactic issues
2017-11-15 v2.1
- Fixed some wrong lemmata, POS tags
- Fixed miscellaneous syntactic issues
- Added basic dependencies into the
DEPScolumn according to the CONLL-U v2 format
2017-02-15 v2.0
- Updated treebank to conform to v2 guidelines
- Fixed some wrong lemmata
- Fixed miscellaneous syntactic issues
- Added empty nodes for gapped constructions in enhanced representation
2016-11-15 v1.4
- Changed POS tag of fused det-noun pronouns (e.g., "somebody", "nothing")
to
PRON - Added original, untokenized sentences to CoNLL-U files
- Fixed some POS errors, features and wrong lemmata
- Fixed miscellaneous syntactic issues in a few sentences
2016-05-15 v1.3
- Improved mapping of
WDTto UPOS - Corrected lemma of "n't" to "not"
- Fixed some errors between
advcl,ccompandparataxis - Fixed inconsistent analyses of sentences repeated between dev and train sets
- Fixed miscellaneous syntactic issues in a few sentences
2015-11-15 v1.2
- Bugfix: removed _NFP suffix from some lemmas
- Fixed date annotations to adopt UD standard
- Remove escaping of ( and ) from word tokens (XPOSTAGs are still
-LRB-and-RRB-) - Improved precision of
xcomprelation - Improved recall of
namerelation - Corrected lemmas for reduced auxiliaries
- Corrected UPOS tags of pronominal uses of this/that/these/those (from
DETtoPRON) - Corrected UPOS tags of subordinating conjunctions (from
ADPtoSCONJ) - Corrected UPOS tags of some main verbs (from
AUXtoVERB)
Contributing
To help improve the corpus, please alert us to any errors you find in it. The best way to do this is to file a github issue at:
https://github.com/UniversalDependencies/UD_English-EWT/issues
We also welcome pull requests. If you want to make edits, please modify the
trees in the individual files in the not-to-release/sources directory instead
of making direct changes to en_ewt-ud-{dev,test,train}.conllu.
Acknowledgments
Annotation of the Universal Dependencies English Web Treebank was carried out by (in order of size of contribution):
- Natalia Silveira
- Timothy Dozat
- Sebastian Schuster
- Miriam Connor
- Marie-Catherine de Marneffe
- Nathan Schneider
- Ethan Chi
- Samuel Bowman
- Christopher Manning
- Hanzhi Zhu
- Daniel Galbraith
- John Bauer
Creation of the CoNLL-U files, including calculating UPOS, feature, and lemma information was primarily done by
- Sebastian Schuster
- Natalia Silveira
The construction of the Universal Dependencies English Web Treebank was partially funded by a gift from Google, Inc., which we gratefully acknowledge.
Citations
You are encouraged to cite this paper if you use the Universal Dependencies English Web Treebank:
@inproceedings{silveira14gold,
year = {2014},
author = {Natalia Silveira and Timothy Dozat and Marie-Catherine de
Marneffe and Samuel Bowman and Miriam Connor and John Bauer and
Christopher D. Manning},
title = {A Gold Standard Dependency Corpus for {E}nglish},
booktitle = {Proceedings of the Ninth International Conference on Language
Resources and Evaluation (LREC-2014)}
}
Metadata
=== Machine-readable metadata (DO NOT REMOVE!) ================================
Data available since: UD v1.0
License: CC BY-SA 4.0
Includes text: yes
Genre: blog social reviews email web
Lemmas: automatic with corrections
UPOS: converted with corrections
XPOS: manual native
Features: automatic
Relations: manual native
Contributors: Silveira, Natalia; Dozat, Timothy; Manning, Christopher; Schuster, Sebastian; Chi, Ethan; Bauer, John; Connor, Miriam; de Marneffe, Marie-Catherine; Schneider, Nathan; Bowman, Sam; Zhu, Hanzhi; Galbraith, Daniel; Bauer, John
Contributing: here source
Contact: [email protected]
===============================================================================