Inferring about fraudulent collusion risk on Brazilian public works contracts in official texts using a Bi-LSTM approach. - Marcos C. Lima; Roberta Silva; Felipe Lopes de Souza Mendes; Leonardo Rebouças de Carvalho; Aletéia P. F. Araújo; Flavio de Barros Vidal (EMNLP (Findings), 2020)