(2) Lexical entrainment: Speakers tend to reuse words that were effective in previous mentions (Garrod and Anderson, 1987; Brennan and Clark, 1996) possibly due to priming effects (Pickering and Garrod, 2004).
besides being a challenging problem intriguing from a linguistic and psycholinguistic point of view, computationally modelling the generation of subsequent references can contribute to better user adaptation in dialogue systems and to more natural humancomputer interaction.