(S (S (NP (BASENP (DT The) (NNP Police) (NNP Service)) (PP (IN of) (BASENP (NNP Northern) (NNP Ireland)))) (VP (VBP are) (VP (VP (VBG asking) (BASENP (DT any) (NNS witnesses))) (S (VP (TO to) (VP (VP (VB contact) (BASENP (PRP them))) (ADVP (ADVP (RB as) (RB soon)) (PP (IN as) (ADJP (JJ possible)))))))))) (PERIOD .))