Developing a multilayer semantic annotation scheme based on ISO standards for the visualization of a newswire corpus Purificação Silvano author António Leal author Fátima Silva author Inês Cantante author Fatima Oliveira author Alípio Mario Jorge author 2021-06 text Proceedings of the 17th Joint ACL - ISO Workshop on Interoperable Semantic Annotation Harry Bunt editor Association for Computational Linguistics Groningen, The Netherlands (online) conference publication silvano-etal-2021-developing https://aclanthology.org/2021.isa-1.1/ 2021-06 1 13