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 turned its beheadings of hostages into horror shows , producing propaganda videos seemingly aimed at producing the maximum amount of terror . 2: Sadly , the shock of the mass killings of the Ethiopian Christians in April may have been dulled simply because of a nearly identical atrocity a few weeks before . 3: ISIS produced propaganda videos showing beheadings of Egyptian , Ethiopian Christians .

1: its beheadings of hostages 2: the mass killings of the Ethiopian Christians in April 3: beheadings of Egyptian , Ethiopian Christians