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: It shows a teenage boy in the schoolyard of a West London secondary school . 2: Who Mohammed Emwazi used to be . 3: Video shows a young Mohammed Emwazi in a West London schoolyard .

1: a teenage boy 2: Mohammed Emwazi 3: a young Mohammed Emwazi