(S (S (BASENP (DT The) (NN bomb)) (VP (VP (VBD destroyed) (BASENP (DT the) (NN mess) (NN hall))) (COMMA ,) (S (UCP (VP (VP (VBG killing) (NP (QP (ADVP (IN at) (JJS least)) (NN 15)))) (CC and) (VP (VBG injuring) (BASENP (QP (NN 50) (RBR more))))) (COMMA ,) (BASENP (NN six) (RB critically)))))) (PERIOD .))