Category Semantic Similarity

Proposition Knowledge Graphs

Proposition Knowledge Graphs. Gabriel Stanovsky, Omer Levy, and Ido Dagan. AHA! Workshop 2014. [pdf] This position paper proposes a novel representation for Information Discovery — Proposition Knowledge Graphs. These extend the Open IE paradigm by representing semantic inter-proposition relations in a traversable graph. . . . . . Advertisements

Linguistic Regularities in Sparse and Explicit Word Representations *Best Paper CoNLL 2014*

Linguistic Regularities in Sparse and Explicit Word Representations. Omer Levy and Yoav Goldberg. CoNLL 2014. [pdf] [slides] This fascinating result raises a question: to what extent are the relational semantic properties a result of the embedding process? Experiments show that the RNN-based embeddings are superior to other dense representations, but how crucial is it for […]

Dependency-Based Word Embeddings

Dependency-Based Word Embeddings. Omer Levy and Yoav Goldberg. Short paper in ACL 2014. [pdf] [slides] While continuous word embeddings are gaining popularity, current models are based solely on linear contexts. In this work, we generalize the skip-gram model with negative sampling introduced by Mikolov et al. to include arbitrary contexts. Code The code used in […]

word2vec Explained: Deriving Mikolov et al.’s Negative-Sampling Word-Embedding Method

word2vec Explained: Deriving Mikolov et al.’s Negative-Sampling Word-Embedding Method. Yoav Goldberg and Omer Levy. arXiv 2014. [pdf] The word2vec software of Tomas Mikolov and colleagues has gained a lot of traction lately, and provides state-of-the-art word embeddings. The learning models behind the software are described in two research papers. We found the description of the […]

UKP-BIU: Similarity and Entailment Metrics for Student Response Analysis

UKP-BIU: Similarity and Entailment Metrics for Student Response Analysis. Torsten Zesch, Omer Levy, Iryna Gurevych, and Ido Dagan. SemEval 2013. [pdf] [slides] Given a question, a reference answer, and a student’s answer, the task is to determine whether the student answered correctly. While this is not a new task in itself, the challenge focuses on employing textual entailment technologies […]