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# Coordination Structures in Dependency Treebanks

**Authors:** [Martin Popel](https://md.mova.elamur.ai/free/en/docs/papers/authors/martin-popel/), [David Mareček](https://md.mova.elamur.ai/free/en/docs/papers/authors/david-marecek/), [Jan Štěpánek](https://md.mova.elamur.ai/free/en/docs/papers/authors/jan-stepanek/), [Daniel Zeman](https://md.mova.elamur.ai/free/en/docs/papers/authors/daniel-zeman/), [Zdeněk Žabokrtský](https://md.mova.elamur.ai/free/en/docs/papers/authors/zdenek-zabokrtsku/) · **Year:** 2013 · **Venue:** Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) **Link:** [aclanthology.org/P13-1051](https://aclanthology.org/P13-1051/) · **Licence:** [CC BY-NC-SA 3.0](https://creativecommons.org/licenses/by-nc-sa/3.0/) — summary only

[**41** citations](https://openalex.org/works?filter=cites:W2159514223) openalex · 2026-10-18[**25** citations in our library](https://md.mova.elamur.ai/free/en/docs/papers/cited-by/aclbulk-2013-popel-coordination-structures-dependency-treebanks/) of the 140673 papers whose bibliographies we read[Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)](https://aclanthology.org/volumes/P13-1/)[licence](https://creativecommons.org/licenses/by-nc-sa/3.0/)

- [Publisher's page](https://aclanthology.org/P13-1051/)
- [PDF](https://aclanthology.org/P13-1051.pdf)
- [OpenAlex](https://openalex.org/W2159514223)

**Authors (5)**

1. [Martin Popel](https://openalex.org/A5083887502) [ORCID](https://orcid.org/0000-0002-3628-8419) · h 21 · 2689 citations · 110 works
2. [David Mareček](https://openalex.org/A5066030227) [ORCID](https://orcid.org/0000-0001-5327-488X) · h 17 · 848 citations · 142 works
3. Jan Štěpánek
4. [Daniel Zeman](https://openalex.org/A5061392927) [ORCID](https://orcid.org/0000-0002-5791-6568) · h 28 · 4506 citations · 176 works
5. [Zdeněk Žabokrtský](https://openalex.org/A5088317432) [ORCID](https://orcid.org/0000-0001-8149-4054) · h 23 · 2057 citations · 167 works

Citations and author metrics from openalex (2026-10-18); authors with the same name are not always told apart.

## What it is about

A dependency tree cannot show the symmetric relation between conjuncts without a convention, so every treebank picks one. The paper surveys these conventions: which node heads the coordination (the first conjunct, the conjunction, or a chain of conjuncts), how shared modifiers attach, and how labels mark conjunct roles. It proposes a taxonomy of the encodings and applies it to treebanks in 26 languages. It also reports empirical observations on how far one style can be converted into another. The authors do not decide which style parses best, but they note that coordination is among the most frequent sources of parsing errors.

## Ideas

- I1. `en/src/convert.rs`: add a converter option for the coordination style, record the source style in MISC, and measure on EWT train that a chained-style round trip returns the same arcs (target 100% unchanged).
- I2. `en parse-eval`: break LAS down by coordination, reporting the share of errors on `conj` and `cc` arcs on EWT test; train `en` on the chained and on the first-conjunct style and compare LAS, two runs each.
- I3. `tools/treeagree` rule R2 (chained conj): count, per 1,000 sentences, the coordinations in the Haiku silver trees that mix two styles, using `treeagree check`.
- I4. `annot` teacher instructions: ask the teacher to use one coordination style per corpus, and measure `treeagree` gate violations on 300 sentences before and after.

## For Mova

Touches [24. Coordination and subordination](https://md.mova.elamur.ai/free/en/docs/languages/en/24-coordination-subordination/). The `en` parser and `gparse` both read the coordination style directly, so a style mix in the silver corpus would show as parser error on `conj`. Measure first the share of `conj` and `cc` errors on EWT test (I2), since it needs no training run.

Topics: [Treebanks](https://md.mova.elamur.ai/free/en/docs/papers/topics/treebanks/)

## Cite

The paper itself, not this card. BibTeX from the library's record of the work.

```
@inproceedings{popel2013coordination,
  title = {{Coordination Structures in Dependency Treebanks}},
  author = {Popel, Martin and Mareček, David and Štěpánek, Jan and Zeman, Daniel and Žabokrtský, Zdeněk},
  booktitle = {Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)},
  year = {2013},
  url = {https://aclanthology.org/P13-1051/}
}
```

- [← previous Turning on the Turbo: Fast Third-Order Non-Projective Turbo Parsers](https://md.mova.elamur.ai/free/en/docs/papers/aclbulk-2013-martins-turning-turbo-fast-third-order/)
- [next → A Dependency Parser for Tweets](https://md.mova.elamur.ai/free/en/docs/papers/aclbulk-2014-kong-dependency-parser-tweets/)
- [↑ back to English](https://md.mova.elamur.ai/free/en/docs/papers/en/)

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