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: The situation in Yarmouk was thrust in to the headlines on April 1 when ISIS fighters stormed the rebel-held area and unleashed a campaign of violence and killings . 2: U.N . official to visit besieged refugee camp . 3: ISIS raided Yarmouk refugee camp near Damascus on April 1 .

1: the rebel-held area 2: besieged refugee camp 3: Yarmouk refugee camp near Damascus