(S (S (NP (NP (BASENP (DT An) (JJ overnight) (NN explosion) (CC and) (NN fire)) (PP (IN at) (NP (BASENP (DT a) (NNP Washington) (NNP State) (NN oil) (NN refinery)) (PP (IN in) (NP (NP (BASENP (NNP Anacortes)) (COMMA ,) (NP (BASENP (NNP Washington)) (COMMA ,) (BASENP (NNP United) (NNPS States)))) (COMMA ,) (NP (BASENP (DT a) (NN city)) (ADVP (BASENP (QP (RB about) (NN 80)) (NNS miles)) (ADVP (RB south) (PP (IN of) (NP (BASENP (NNP Vancouver)) (COMMA ,) (BASENP (NNP Canada)))))))))))) (COMMA ,) (BASENP (NN yesterday))) (VP (VP (VBD killed) (BASENP (NN four) (NNS people))) (CC and) (VP (ADVP (RB critically)) (VP (VBD injured) (BASENP (NN three) (NNS others)))))) (PERIOD .))