(S (S (PP (ADVP (RB Also)) (PP (IN on) (BASENP (NNP Wednesday)))) (COMMA ,) (S (BASENP (DT the) (NNP Black) (NNP Hat) (NNPS Briefings) (NN computer) (NN security) (NN conference)) (VP (VBZ begins)))) (PERIOD .))