EUROTRA: The EEC R&D programme for the creation of a machine translation system of advanced design Sergei Perschke author 1987-sep 17-19 text Proceedings of Machine Translation Summit I Makoto Nagao editor Hakone, Japan conference publication perschke-1987-eurotra https://aclanthology.org/1987.mtsummit-1.26/ 1987-sep 17-19