Using paraphrases for improving first story detection in news and Twitter Saša Petrović author Miles Osborne author Victor Lavrenko author 2012-06 text Proceedings of the 2012 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Eric Fosler-Lussier editor Ellen Riloff editor Srinivas Bangalore editor Association for Computational Linguistics Montréal, Canada conference publication petrovic-etal-2012-using https://aclanthology.org/N12-1034/ 2012-06 338 346