DATE: | Wed, Nov 27, 2013 |
TIME: | 11:45 am |
PLACE: | Council Room (SITE 5-084) |
TITLE: | Distributional Semantics BeyondWords: Supervised Learning of Analogy and Paraphrase |
PRESENTER: | Peter Turney NRC |
ABSTRACT:
There have been several efforts to extend distributional semantics beyond individual
words, to measure the similarity of word pairs, phrases, and sentences (briefly, tuples; ordered
sets of words, contiguous or noncontiguous). One way to extend beyond words is to compare
two tuples using a function that combines pairwise similarities between the component
words in the tuples. A strength of this approach is that it works with both relational
similarity (analogy) and compositional similarity (paraphrase). However, past work
required hand-coding the combination function for different tasks. The main contribution
of this paper is that combination functions are generated by supervised learning. We achieve
state-of-the-art results in measuring relational similarity between word pairs (SAT analogies
and SemEval 2012 Task 2) and measuring compositional similarity between noun-modifier
phrases and unigrams (multiple-choice paraphrase questions).
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