(S (S (BASENP (NNP Wednesday) (NN morning)) (COMMA ,) (S (BASENP (DT the) (NNP Frankfurt) (NNP Book) (NNP Fair)) (VP (VP (VP (VBD opened) (BASENP (PRPD its) (NNS gates))) (PP (TO to) (NP (BASENP (DT the) (NN first)) (PP (IN of) (NP (BASENP (DT an) (JJ estimated) (NN 280,000) (NNS visitors)) (BASENP (DT this) (NN year))))))) (PP (IN in) (NP (BASENP (NNP Frankfurt) (NNP am) (NNP Main)) (COMMA ,) (NNP Germany)))))) (PERIOD .))