(S (S (BASENP (DT This)) (VP (VP (VBZ is) (NP (NP (NP (BASENP (DT the) (JJ first) (NN death)) (PP (IN of) (BASENP (DT a) (NN police) (NN officer)))) (PP (TO to) (BASENP (JJ sectarian) (NN violence)))) (PP (IN in) (BASENP (QP (RB over) (DT a)) (NN decade))))) (CONJP (COMMA ,) (CC and)) (VP (VBZ comes) (PP (IN after) (NP (BASENP (DT a) (ADJP (NN nine) (NN month)) (NN period)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (BASENP (NN intelligence)) (VP (VBD indicated) (SBAR (IN that) (S (BASENP (NNS dissidents)) (VP (VBD were) (VP (VBG aiming) (S (VP (TO to) (VP (VB kill) (BASENP (DT a) (NN policeman))))))))))))))))) (PERIOD .))