Since our solution to IER establishes a relationship between entity definitions and the input text, the tasks of paraphrase recognition (Barzilay and Elhadad, 2003) (Dolan et al., 2004) and textual entailment recognition (Giampiccolo et al., 2007) are related to our solution.
these tasks are fundamentally different in two aspects: 1) Both paraphrase recognition and textual entailment recogni-tion are defined at the sentence level, whereas text phrases considered for IER can exist as a sentence fragment or span across multiple sentences, and 2) The objective of IER is to find whether a given text phrase has a mention of an entity-as opposed to determining whether two sentences are similar or entail one another.