Better n-best translations through generative n-gram language models Boxing Chen author Marcello Federico author Mauro Cettolo author 2007-sep 10-14 text Proceedings of Machine Translation Summit XI: Papers Bente Maegaard editor Copenhagen, Denmark conference publication chen-etal-2007-better https://aclanthology.org/2007.mtsummit-papers.15/ 2007-sep 10-14