STREUSLE: a corpus with comprehensive lexical semantic annotation (multiword expressions, supersenses)
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STREUSLE annotations visualized with

STREUSLE stands for Supersense-Tagged Repository of English with a Unified Semantics for Lexical Expressions. The text is from the web reviews portion of the English Web Treebank [8]. STREUSLE incorporates comprehensive annotations of multiword expressions (MWEs) [1] and semantic supersenses for lexical expressions. The supersense labels apply to single- and multiword noun and verb expressions, as described in [2], and prepositional/possessive expressions, as described in [3, 4, 5, 6, 7]. The 4.0 release [7] updates the inventory and application of preposition supersenses, applies those supersenses to possessives (detailed in [6]), incorporates the syntactic annotations from the Universal Dependencies project, and adds lexical category labels to indicate the holistic grammatical status of strong multiword expressions. The 4.1 release adds subtypes for verbal MWEs (VID, VPC.{full,semi}, LVC.{full,cause}, IAV) according to PARSEME 1.1 guidelines [14].

Release URL:
Additional information:

The English Web Treebank sentences were also used by the Universal Dependencies (UD) project as the primary reference corpus for English [9]. STREUSLE incorporates the syntactic and morphological parses from UD_English-EWT v2.2 (with the exception of one lemma, token 14 in reviews-091704-0004, which is a typo); these were released July 1, 2018 and follow the UD v2 standard.

This dataset's multiword expression and supersense annotations are licensed under a Creative Commons Attribution-ShareAlike 4.0 International license (see LICENSE). The UD annotations are redistributed under the same license. The source sentences and PTB part-of-speech annotations, which are from the Reviews section of the English Web Treebank (EWTB; [8]), are redistributed with permission of Google and the Linguistic Data Consortium, respectively.

An independent effort to improve the MWE annotations from those in STREUSLE 3.0 resulted in the HAMSTER resource [13]. The HAMSTER revisions have not been merged with the 4.0 revisions, though we intend to do so for a future release.


  • streusle.conllulex: Full dataset.

  •, LEXCAT.txt, MWES.txt, SUPERSENSES.txt: Statistics summarizing the full dataset.

  • train/, dev/, test/: Data splits established by the UD project and accompanying statistics.

  • Contributors and support that made this dataset possible.

  • Description of data format.

  • Instructions for working with the data as a spreadsheet.

  • LICENSE.txt: License.

  • Links to resources reported in [7].

  • Script to validate the data and convert it to JSON.

  • Script to create an Excel-readable CSV file with the data.

  • Script to convert an Excel-generated CSV file to .conllulex.

  • Utility for adding heuristic preposition/possessor governor and object links to the JSON.

  • Utilities for working with lexical categories.

  • Utilities for working with MWEs.

  • Utilities for working with supersense labels.

  • Utility for browsing MWE and supersense annotations.

  • Utilities for working with BIO-style tags.

  • Utility for searching the data for tokens that meet certain criteria.

  • Unified evaluation script for MWEs and supersenses.

  • Evaluation script for preposition/possessive supersense labeling only.

  • pssid/: Heuristics for identifying SNACS targets.


This release introduces a new tabular data format, CONLLULEX, with a script to convert it to JSON. The .sst and .tags formats from STREUSLE 3.0 are not expressive enough for the 4.0 data, and are no longer supported.


Citations describing the annotations in this corpus (main STREUSLE papers in bold):

  • [1] Nathan Schneider, Spencer Onuffer, Nora Kazour, Emily Danchik, Michael T. Mordowanec, Henrietta Conrad, and Noah A. Smith. Comprehensive annotation of multiword expressions in a social web corpus. Proceedings of the Ninth International Conference on Language Resources and Evaluation, Reykjavík, Iceland, May 26–31, 2014.

  • [2] Nathan Schneider and Noah A. Smith. A corpus and model integrating multiword expressions and supersenses. Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Denver, Colorado, May 31–June 5, 2015.

  • [3] Nathan Schneider, Jena D. Hwang, Vivek Srikumar, Meredith Green, Abhijit Suresh, Kathryn Conger, Tim O'Gorman, and Martha Palmer. A corpus of preposition supersenses. Proceedings of the 10th Linguistic Annotation Workshop, Berlin, Germany, August 11, 2016.

  • [4] Jena D. Hwang, Archna Bhatia, Na-Rae Han, Tim O’Gorman, Vivek Srikumar, and Nathan Schneider. Double trouble: the problem of construal in semantic annotation of adpositions. Proceedings of the Sixth Joint Conference on Lexical and Computational Semantics, Vancouver, British Columbia, Canada, August 3–4, 2017.

  • [5] Nathan Schneider, Jena D. Hwang, Archna Bhatia, Na-Rae Han, Vivek Srikumar, Tim O’Gorman, Sarah R. Moeller, Omri Abend, Austin Blodgett, and Jakob Prange (July 2, 2018). Adposition and Case Supersenses v2: Guidelines for English. arXiv preprint.

  • [6] Austin Blodgett and Nathan Schneider (2018). Semantic supersenses for English possessives. Proceedings of the 11th International Conference on Language Resources and Evaluation, Miyazaki, Japan, May 9–11, 2018.

  • [7] Nathan Schneider, Jena D. Hwang, Vivek Srikumar, Jakob Prange, Austin Blodgett, Sarah R. Moeller, Aviram Stern, Adi Bitan, and Omri Abend. Comprehensive supersense disambiguation of English prepositions and possessives. Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics, Melbourne, Australia, July 15–20, 2018.

Related work:

  • [8] Ann Bies, Justin Mott, Colin Warner, and Seth Kulick. English Web Treebank. Linguistic Data Consortium, Philadelphia, Pennsylvania, August 16, 2012.

  • [9] Natalia Silveira, Timothy Dozat, Marie-Catherine de Marneffe, Samuel R. Bowman, Miriam Connor, John Bauer, and Christopher D. Manning (2014). A gold standard dependency corpus for English. Proceedings of the Ninth International Conference on Language Resources and Evaluation, Reykjavík, Iceland, May 26–31, 2014.

  • [10] Nathan Schneider, Emily Danchik, Chris Dyer, and Noah A. Smith. Discriminative lexical semantic segmentation with gaps: running the MWE gamut. Transactions of the Association for Computational Linguistics, 2(April):193−206, 2014.

  • [11] Nathan Schneider, Jena D. Hwang, Vivek Srikumar, and Martha Palmer. A hierarchy with, of, and for preposition supersenses. Proceedings of the 9th Linguistic Annotation Workshop, Denver, Colorado, June 5, 2015.

  • [12] Nathan Schneider, Dirk Hovy, Anders Johannsen, and Marine Carpuat. SemEval-2016 Task 10: Detecting Minimal Semantic Units and their Meanings (DiMSUM). Proceedings of the 10th International Workshop on Semantic Evaluation, San Diego, California, June 16–17, 2016.

  • [13] King Chan, Julian Brooke, and Timothy Baldwin. Semi-automated resolution of inconsistency for a harmonized multiword expression and dependency parse annotation. Proceedings of the 13th Workshop on Multiword Expressions, Valencia, Spain, April 4, 2017.

  • [14] PARSEME Shared Task 1.1 - Annotation guidelines. 2018.


Questions should be directed to:

Nathan Schneider


  • STREUSLE dev:
    • Added, a unified evaluation script for MWEs + supersenses.
    • Added, for viewing sentences with their MWE and supersense annotations.
    • Improvements to (issue #35, affecting 184 tokens, plus a small fix in 58db569 which affected 53 tokens).
    • Fixed a very small bug in affecting the display of sentence-final matches.
    • Updated UD parses to v2.2.
  • STREUSLE 4.1: 2018-07-02. Added subtypes to verbal MWEs (871 tokens) per PARSEME Shared Task 1.1 guidelines [14]; some MWE groupings revised in the process. Minor improvements to SNACS (preposition/possessive supersense) annotations coordinated with updated guidelines ([5], specifically Implementation of SNACS (preposition/possessive supersense) target identification heuristics from [7]. New utility scripts for listing/filtering tokens ( and converting to and from an Excel-compatible CSV format.
  • STREUSLE 4.0: 2018-02-10. Updated preposition supersenses to new annotation scheme (4398 tokens). Annotated possessives (1117 tokens) using preposition supersenses. Revised a considerable number of MWEs involving prepositions. Added lexical category for every single-word or strong multiword expression. New data format (.conllulex) integrates gold syntactic annotations from the Universal Dependencies project.
  • STREUSLE 3.0: 2016-08-23. Added preposition supersenses
  • STREUSLE 2.1: 2015-09-25. Various improvements chiefly to auxiliaries, prepositional verbs; added `p class label as a stand-in for preposition supersenses to be added in a future release, and `i for infinitival 'to' where it should not receive a supersense. From 2.0 (not counting `p and `i):
    • Annotations have changed for 877 sentences (609 involving changes to labels, 474 involving changes to MWEs).
    • 877 class labels have been changed/added/removed, usually involving a non-supersense label or triggered by an MWE change. Most frequently (118 cases) this was to replace stative with the auxiliary label `a. In only 21 cases was a supersense label replaced with a different supersense label.
  • STREUSLE 2.0: 2015-03-29. Added noun and verb supersenses
  • CMWE 1.0: 2014-03-26. Multiword expressions for 55k words of English web reviews