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 defense 's transition from one brother to the other begins in the ambulances that rushed the brothers from their respective final showdowns with police in Watertown , Massachusetts , on April 19 , 2013 . 2: They have portrayed him as obsessed with jihad , spending hours in his computer trolling al Qaeda-style websites . 3: Defense : Brother Tamerlan , who was killed during police showdown , was obsessed with jihad .

1: one brother 2: him 3: Brother Tamerlan , who was killed during police showdown