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: Levinson , a retired FBI agent , vanished after traveling to the Iranian island of Kish in March 2007 and is one of the longest-held U.S . citizens in history . 2: Iran 's government repeatedly has said it is not holding Levinson and does not know his whereabouts . 3: Levinson , a former FBI agent , went missing in Iran eight years ago ; Iran says it does not know where he is .

1: one of the longest-held U.S . citizens in history 2: Levinson 3: Levinson