(S (S (BASENP (DT The) (NN action)) (VP (VBZ is) (NP (BASENP (DT a) (NN part)) (PP (IN of) (NP (BASENP (DT a) (NN police) (NN operation)) (PP (IN against) (BASENP (NN drug) (NNS dealers)))))))) (PERIOD .))