(S (S (NP (NP (BASENP (NN One) (DT such) (NN oil) (NN spill)) (PP (IN in) (BASENP (NNP California)))) (PP (IN in) (BASENP (NN 2005)))) (VP (VBD was) (NP (BASENP (DT the) (NN result)) (PP (IN of) (NP (BASENP (DT a) (ADJP (RB naturally) (VBN occurring)) (NN crack)) (PP (IN in) (NP (BASENP (DT the) (NN floor)) (PP (IN of) (BASENP (DT the) (NNP Pacific) (NNP Ocean)))))))))) (PERIOD .))