(S (S (NP (BASENP (DT The) (NNP Police) (NNP Service)) (PP (IN of) (BASENP (NNP Northern) (NNP Ireland)))) (VP (VBD believed) (SBAR (SBAR (IN that) (S (BASENP (EX there)) (VP (MD could) (VP (VB have) (VP (VBN been) (NP (DT a) (QT (DQL ``) (BASENP (JJ devastating) (NN outcome)) (DQR '')))))))) (CONJP (COLON --) (CC and)) (SBAR (IN that) (S (BASENP (PRP they)) (VP (VP (VBD were) (ADVP (RB also))) (NP (BASENP (RB potentially) (NNS targets)) (PP (IN of) (BASENP (DT the) (NNS bombers)))))))))) (PERIOD .))