(S (S (SBAR (IN Although) (S (NP (BASENP (NNS officials)) (PP (IN in) (BASENP (NNP Hawaii)))) (VP (VBP have) (VP (VBN confirmed) (SBAR (IN that) (S (BASENP (NNP Obama)) (VP (VBD was) (VP (VBN born) (ADVP (RB there)))))))))) (COMMA ,) (S (BASENP (NNS birthers)) (VP (ADVP (RB still)) (VP (VBP insist) (SBAR (IN that) (S (BASENP (PRP he)) (VP (VP (VBZ has) (RB not)) (VP (VBN proven) (NP (BASENP (PRPD his) (JJ constitutional) (NN eligibility)) (PP (IN as) (BASENP (DT a) (ADJP (JJ natural) (JJ born)) (NN citizen)))))))))))) (PERIOD .))