Interoperable annotation of (co)references in the Democrat project Loïc Grobol author Frédéric Landragin author Serge Heiden author 2017 text Proceedings of the 13th Joint ISO-ACL Workshop on Interoperable Semantic Annotation (ISA-13) conference publication grobol-etal-2017-interoperable https://aclanthology.org/W17-7411/ 2017