(SINV (SINV (S (PP (IN In) (NP (BASENP (NN addition)) (PP (TO to) (BASENP (DT this))))) (S (NP (BASENP (DT the) (NN potential)) (PP (IN of) (BASENP (DT the) (NNP UN) (NN authority)))) (VP (MD should) (VP (VB be) (VP (VBN used)))))) (COMMA ,) (SINV (VP (VBD added)) (BASENP (NNP Mr.) (NNP Prodi)))) (PERIOD .))