In the open RE task there is a great diversity of relations, which makes their classification more difficult.
the produced resources related to this paper (the subset of texts and corresponding positive relation instances manually annotated in tuples (NE1, relation descriptor, NE2) used in each experiment) are electronically available at: http://www.inf.pucrs.br/linatural/data set RE.html In future work, we plan to use open source tools; as well as performing an extension of the proposed process for other languages.