(S (S (BASENP (NNS Police)) (VP (VBP have) (VP (VBN revealed) (SBAR (IN that) (S (BASENP (DT the) (NNS bombs)) (VP (VBD were) (UCP (QT (DQL `) (BASENP (JJ high) (NNS explosives)) (DQR ')) (COLON -) (ADJP (RB not) (JJ homemade))))))))) (PERIOD .))