(S (S (PP (VBG According) (PP (TO to) (BASENP (NN witness) (NNS reports)))) (COMMA ,) (S (BASENP (QP (RB about) (NN twenty)) (NNS people)) (VP (VBD were) (VP (VBN seen) (S (VP (VP (VBG walking) (ADVP (RB away))) (PP (IN from) (BASENP (DT the) (NN crash))))))))) (PERIOD .))