(S (S (QT (DQL ``) (QTC (SQ (VBZ Is) (SQ (BASENP (DT this)) (ADJP (JJ linked) (PP (TO to) (NP (NP (BASENP (DT a) (JJ mechanical) (NN problem)) (COMMA ,) (BASENP (NN drowsiness))) (CC or) (BASENP (DT a) (ADJP (RB totally) (JJ different)) (NN cause))))))) (PERIOD ?)) (DQR '')) (S (BASENP (NNP Bussereau)) (VP (VBD said) (PP (IN at) (BASENP (DT the) (NN scene)))))) (PERIOD .))