(S (S (NP (BASENP (DT The) (NNP National) (NNP Sleep) (NNP Foundation)) (PRN (COMMA ,) (BASENP (DT the) (NN poll) (NN sponsor)) (COMMA ,))) (VP (VBZ reports) (SBAR (S (NP (BASENP (NNS three-quarters)) (PP (IN of) (BASENP (NNS adults)))) (VP (VBP say) (SBAR (S (BASENP (PRP they)) (VP (ADVP (RB frequently)) (VP (VBP have) (NP (BASENP (DT a) (NN sleep) (NN problem)) (COMMA ,) (PP (IN such) (PP (IN as) (S (VP (VP (VBG waking) (PP (IN during) (BASENP (DT the) (NN night)))) (CC or) (VP (VBG snoring)))))))))))))))) (PERIOD .))