(S (S (NP (BASENP (NN Migraine) (NNS sufferers)) (PRN (LRB -LRB-) (VP (VP (VBN thought) (PP (IN in) (BASENP (DT the) (NNP United) (NNP Kingdom)))) (S (VP (TO to) (VP (VB number) (NP (NP (BASENP (QP (RB about) (NN eight)) (NN per) (NN cent)) (PP (IN of) (BASENP (NNS men)))) (CC and) (NP (BASENP (NN eighteen) (NN per) (NN cent)) (PP (IN of) (BASENP (NNS women))))))))) (RRB -RRB-))) (VP (ADVP (RB often)) (VP (VBP complain) (SBAR (IN that) (S (NP (NP (BASENP (NN light)) (COMMA ,) (BASENP (NN noise))) (CC and) (BASENP (NN touch))) (VP (VBP cause) (BASENP (NN pain)))))))) (PERIOD .))