(S (S (QT (DQL ``) (BASENP (NNS Sweeps)) (DQR '')) (VP (VP (VBZ occurs) (NP (BASENP (NN four) (NNS times)) (BASENP (DT a) (NN year)))) (CC and) (VP (VBZ helps) (S (NP (BASENP (NNS networks)) (CC and) (BASENP (JJ independent) (NNS affiliates))) (VP (VB determine) (SBAR (SBAR (WHNP (WRB how) (JJ much)) (S (NP (NP (BASENP (DT a) (JJ fixed) (NN amount)) (PP (IN of) (BASENP (NN time)))) (PP (IN for) (BASENP (JJ commercial) (NN advertisement)))) (VP (MD will) (VP (VB cost))))) (PRN (LRB -LRB-) (FRAG (FRAG (ADJP (DT the) (JJR higher)) (BASENP (DT the) (NNS ratings))) (COMMA ,) (FRAG (BASENP (DT the) (JJR more) (NN revenue)) (PP (IN for) (NP (BASENP (DT the) (NNS networks)) (VP (VP (VBG selling) (BASENP (DT the) (NN time))) (PP (TO to) (BASENP (NNS advertisers)))))))) (RRB -RRB-)))))))) (PERIOD .))