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: Everyone at Kenya 's Garissa University College suffered in some way when a handful of Al-Shabaab gunmen stormed the campus early this month . 2: This tactic of separating non-Muslims from Muslims mirrors what Al-Shabaab attackers did in December at a quarry in the Kenyan village of Kormey , where at least 36 were killed , according to the Kenyan Red Cross . 3: Al-Shabaab has singled out non-Muslims to kill them , as at a Garissa University College .

1: Al-Shabaab gunmen 2: Al-Shabaab attackers 3: Al-Shabaab