ZAC.PB: An Annotated Corpus for Zero Anaphora Resolution in Portuguese Simone Pereira author 2009-09 text Proceedings of the Student Research Workshop Irina Temnikova editor Ivelina Nikolova editor Natalia Konstantinova editor Association for Computational Linguistics Borovets, Bulgaria conference publication pereira-2009-zac https://aclanthology.org/R09-2010/ 2009-09 53 59