CONF Pappas_WMT_2018/IDIAP Beyond Weight Tying: Learning Joint Input-Output Embeddings for Neural Machine Translation Pappas, Nikolaos Miculicich, Lesly Henderson, James multilinguality neural machine translation neural networks output representation learning EXTERNAL http://publications.idiap.ch/attachments/papers/2018/Pappas_WMT_2018.pdf PUBLIC Proceedings of the Third Conference on Machine Translation (WMT) 2018