A Deep Network Model for Paraphrase Detection in Short Text Messages

This paper is concerned with paraphrase detection. The ability to detect similar sentences written in natural language is crucial for several applications, such as text mining, text summarization, plagiarism detection, authorship authentication and question answering. Given two sentences, the objective is to detect whether they are semantically identical. An important insight from this work is that existing paraphrase systems perform well when applied on clean texts, but they do not necessarily deliver good performance against noisy texts. Challenges with paraphrase detection on user generated short texts, such as Twitter, include language irregularity and noise. To cope with these challenges, we propose a novel deep neural network-based approach that relies on coarse-grained sentence modeling using a convolutional neural network and a long short-term memory model, combined with a specific fine-grained word-level similarity matching model. Our experimental results show that the proposed approach outperforms existing state-of-the-art approaches on user-generated noisy social media data, such as Twitter texts, and achieves highly competitive performance on a cleaner corpus. Keywords: 1. Introduction Paraphrase detection, Sentence Similarity, Deep learning, LSTM, CNN Twitter has for some time been a popular means for expressing opinions about a variety of subjects. Recently, the paraphrase detection task has gained significant interest in applied NLP because of the need to deal with the pervasive problem of linguistic variation. Paraphrase detection is an NLP classification problem. Given a pair of sentences, the system determines the semantic similarity between the two sentences.