(S (S (NP (BASENP (DT The) (NNS bombs)) (VP (VBN used))) (VP (VBD comprised) (PP (IN of) (NP (BASENP (DT a) (JJ small) (NN container)) (PP (IN with) (NP (NP (BASENP (NN gas)) (COMMA ,) (BASENP (DT a) (NN detonator))) (CONJP (COMMA ,) (CC and)) (BASENP (DT an) (JJ analog) (NN clock)))))))) (PERIOD .))