(S (S (PP (IN In) (BASENP (NN 2007))) (COMMA ,) (S (NP (BASENP (NN one-third)) (PP (IN of) (NP (BASENP (DT the) (NN world) (POS 's)) (BASENP (NN piracy) (NNS incidents))))) (VP (VBD occurred) (PP (IN in) (BASENP (DT this) (NN region)))))) (PERIOD .))