Textual Analysis for the Protection of Children and Teenagers in Social Media - Classification of Inappropriate Messages for Children and Teenagers. - Thársis Salathiel de Souza Viana; Marcos Antonio de Oliveira 001; Ticiana Linhares Coelho da Silva; Mário Sérgio Rodrigues Falcão Júnior; Enyo José Tavares Gonçalves (ICEIS (2), 2017)