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: Islamabad , Pakistan ( CNN ) Police have arrested more than 500 parents in and around the northwestern Pakistani city of Peshawar for not allowing their children to get the polio vaccine , an official said Tuesday . 2: Those arrested will be released on bail if they sign an affidavit stating that they will let their children get vaccinated , according to the deputy commissioner . 3: Official : Parents who sign affidavit vowing to vaccinate their children will be released .

1: their children 2: their children 3: their children