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: Another aviation analyst , David Soucie , said the quickness of the descent shows something went wrong , but also that the plane was not out of control . 2: O'Brien pointed out the known details of the crash -- a rapid descent , no radio call and a flight that continues into the mountains -- are not part of a  typical emergency scenario .  3: CNN aviation analyst says this is not a typical emergency incident , but all possibilities are part of probe .

1: aviation analyst 2: O'Brien 3: CNN aviation analyst