The QT21 Combined Machine Translation System for English to Latvian

Jan-Thorsten Peter, Hermann Ney, Ond{\v{r}}ej Bojar, Ngoc-Quan Pham, Jan Niehues, Alex Waibel, Franck Burlot, Fran{\c{c}}ois Yvon, M{\=a}rcis Pinnis, Valters {\v{S}}ics, Jasmijn Bastings, Miguel Rios, Wilker Aziz, Philip Williams, Fr{\'e}d{\'e}ric Blain, Lucia Specia