(S (S (S (BASENP (DT The) (NNP United) (NNPS Nations) (NNP Secretariat)) (VP (VBZ is) (NP (BASENP (NN one)) (PP (IN of) (NP (BASENP (DT the) (JJ principal) (NNS organs)) (PP (IN of) (BASENP (DT the) (NNP United) (NNPS Nations)))))))) (CC and) (S (BASENP (PRP it)) (VP (VBZ is) (VP (VP (VBN headed) (PP (IN by) (BASENP (DT the) (NNP United) (NNPS Nations) (NNP Secretary) (NNP General)))) (CC and) (VP (VBN assisted) (PP (IN by) (NP (BASENP (DT a) (NN staff)) (PP (IN of) (NP (BASENP (JJ international) (JJ civil) (NNS servants)) (ADJP (JJ worldwide))))))))))) (PERIOD .))