(S (S (PP (IN In) (BASENP (NNP Britain))) (COMMA ,) (S (S (BASENP (PRP it)) (VP (VP (VBZ is) (VP (VBN estimated))) (SBAR (IN that) (S (BASENP (NNS migraines)) (VP (VP (VBP affect) (NP (BASENP (NN 20) (NN per) (NN cent)) (PP (IN of) (BASENP (DT the) (NN population))))) (COMMA ,) (PP (IN with) (S (BASENP (QP (RB about) (NN 190,000)) (NNS migraines)) (VP (VBG occurring) (ADVP (RB daily)))))))))) (CC and) (S (BASENP (QP (RB over) (NN 25) (NN million))) (VP (VP (VP (VBD lost) (BASENP (NNS days))) (PP (IN from) (BASENP (NN work)))) (BASENP (DT every) (NN year)))))) (PERIOD .))