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: ( CNN ) In an audio message purportedly from an ISIS spokesman , the group announced that a pledge of allegiance from Nigerian-based Boko Haram has been accepted by ISIS leader Abu Bakr al-Baghdadi . 2: The message says that the caliphate , or Islamic State , has expanded to western Africa and congratulated  our jihadi brothers  there . 3: Abu Bakr al-Baghdadi 's spokesman congratulated  our jihadi brothers  in western Africa .

1: an ISIS spokesman 2: the caliphate , or Islamic State 3: Abu Bakr al-Baghdadi 's spokesman