Philipp Helfrich author Elias Rieb author Giuseppe Abrami author Andy Lücking author Alexander Mehler author 2018-05 text Nicoletta Calzolari editor Khalid Choukri editor Christopher Cieri editor Thierry Declerck editor Sara Goggi editor Koiti Hasida editor Hitoshi Isahara editor Bente Maegaard editor Joseph Mariani editor Hélène Mazo editor Asuncion Moreno editor Jan Odijk editor Stelios Piperidis editor Takenobu Tokunaga editor European Language Resources Association (ELRA) Miyazaki, Japan conference publication helfrich-etal-2018-treeannotator https://aclanthology.org/L18-1308/ 2018-05