Definition: You will be given three sentences. Read them, then identify a noun phrase (person, place, or thing) or event that is shared between all three sentences. As the output, write the span of the text corresponding to that phrase in each sentence. Keep the order of the sentences, that is, your answer should look like: 1: *a phras from sentence 1e* 2: *a phras from sentence 2* 3: *a phrase from sentence 3*
Input: 1: London ( CNN ) A British mother is standing by her decision to let her son , 11 , wear a  Fifty Shades of Grey  costume to his school 's World Book Day celebration . 2: I thought Christian Grey was the most talked about book character for the past few years . 3: A UK boy , 11 , dressed as  Fifty Shades  character Christian Grey for World Book Day .

1: Book 2: book 3: Book