(S (S (PP (IN At) (BASENP (NN 1:15) (NN a.m.))) (S (BASENP (NNP Saturday)) (COMMA ,) (S (PP (VBG according) (PP (TO to) (BASENP (NNS witnesses)))) (COMMA ,) (S (S (BASENP (DT the) (NN bus)) (VP (VBD was) (VP (VBG going) (PP (IN through) (BASENP (DT a) (JJ green) (NN light)))))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT the) (NN car)) (VP (VP (VBD made) (BASENP (DT a) (NN turn))) (PP (IN in) (NP (BASENP (NN front)) (PP (IN of) (BASENP (PRP it)))))))))))) (PERIOD .))