(S (S (NP (BASENP (DT A) (NN spokesperson)) (PP (IN for) (BASENP (DT the) (NNP Royal) (NNP Mail)))) (VP (VBD said) (SBAR (S (S (BASENP (DT the) (JJ postal) (NN service)) (VP (VBZ is) (VP (VBG cooperating) (PP (IN with) (BASENP (NNS police)))))) (SBAR (IN as) (S (BASENP (PRP they)) (VP (VBP investigate) (BASENP (DT the) (NN incident))))))))) (PERIOD .))