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: ISIS has also promoted videos of young boys training as fighters , some of them wearing the militants ' black masks , holding bullets and waving the group 's flags . 2: Another boy told CNN last year that ISIS forced his father to send him to one of its children 's camps in northern Syria when he was just 13 . 3: Boys have told CNN of their military training by the jihadist group .

1: young boys 2: boy 3: Boys