(S (S (SBAR (WHADVP (WRB When)) (S (BASENP (PRP he)) (VP (VBD was) (VP (VBN booked) (CC and) (VBN released))))) (COMMA ,) (S (BASENP (PRP he)) (VP (VBD was) (VP (VP (VBN observed) (PP (IN by) (BASENP (NNS officers)))) (S (VP (VBG getting) (PP (IN into) (BASENP (DT the) (JJ unmarked) (NN police) (NN car))))))))) (PERIOD .))