All links are not the same: evaluating word alignments for statistical machine translation Paul C Davis author Zhuli Xie author Kevin Small author 2007-sep 10-14 text Proceedings of Machine Translation Summit XI: Papers Bente Maegaard editor Copenhagen, Denmark conference publication davis-etal-2007-links https://aclanthology.org/2007.mtsummit-papers.17/ 2007-sep 10-14