ESPADA

<h3>Introduction</h3><br>
<p>ESPADA (Extended Syntactic Phrase Alignment DAtaset) consists of annotated parse trees and alignment on English sentential paraphrases extracted from machine translation evaluation corpora. It extends <a href="../../../LDC2018T09">SPADE (LDC2018T09)</a> by adding new annotated data for training/testing phrasal paraphrase detection and phrase representation models to SPADE's development and test sets.</p><br>
<p>Reference translations from machine translation evaluation corpora were used as sentential paraphrases. They were sourced from the following data sets released by LDC from the NIST (National Institute of Standards and Technology) open machine translation evaluation series (<a href="https://www.nist.gov/itl/iad/mig/open-machine-translation-evaluation">OpenMT</a>): <a href="../../../LDC2010T14">LDC2010T14</a>, <a href="../../../LDC2010T17">LDC2010T17</a>, <a href="../../../LDC2010T21">LDC2010T21</a>, <a href="../../../LDC2010T23">LDC2010T23</a>, and <a href="../../../LDC2013T03">LDC2013T03</a>.</p><br>
<h3>Data</h3><br>
<p>Reference translations were randomly extracted for annotation from NIST OpenMT corpora. Gold standard annotations of HPSG (head-driven phrase structure grammar) trees and phrase alignments were performed, resulting in 251,972 phrase alignments identified in 1,916 sentential paraphrases. Further information about the annotation process is contained in the documentation accompanying this release.</p><br>
<p>All annotation data is presented as UTF-8 XML.</p><br>
<h3>Samples</h3><br>
<p>Please view this <a href="desc/addenda/LDC2021T10.xml">sample (XML)</a>.</p><br>
<h3>Updates</h3><br>
<p>None at this time.</p></br>
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