(S (S (NP (BASENP (DT The) (NN mayor)) (PP (IN of) (BASENP (NNP Champaign) (COMMA ,) (NNP Illinois)))) (VP (VP (VBZ denies) (SBAR (IN that) (S (BASENP (NNP Barack) (NNP Obama)) (VP (VBZ is) (ADJP (JJ eligible) (S (VP (TO to) (VP (VB hold) (NP (BASENP (DT the) (JJS highest) (NN office)) (PP (IN in) (BASENP (DT the) (NNP United) (NNPS States)))))))))))) (COMMA ,) (S (VP (VBG joining) (NP (BASENP (NNS others)) (SBAR (WHNP (WP who)) (S (VP (VBP question) (NP (BASENP (DT the) (NN validity)) (PP (IN of) (NP (BASENP (DT the) (NN president) (POS 's)) (BASENP (NN birth) (NN certificate))))))))))))) (PERIOD .))