(S (S (S (NP (QP (ADVP (IN At) (JJS least)) (NN twenty)) (NP (NP (BASENP (NNS motorcyclists)) (COMMA ,) (BASENP (NN car) (NNS drivers))) (CC and) (BASENP (NNS passengers)))) (VP (VBP are) (VP (VBN thought) (S (VP (TO to) (VP (VB be) (ADJP (JJ dead)))))))) (CONJP (COMMA ,) (CC but)) (S (PP (IN as) (PP (IN of) (BASENP (NN midnight)))) (COMMA ,) (S (BASENP (DT no) (NNS bodies)) (VP (VBD had) (VP (VBN been) (VP (VBN recovered))))))) (PERIOD .))