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 ) Saudi Arabia is leading a military campaign against Shiite rebels in Yemen , bringing the wider region directly into a complex conflict that has festered for months . 2: Analysts say it can be summed up in one word : Iran . 3: Saudi Arabia sees Houthi rebels in Yemen as a proxy for Iran , analysts say .

1: a complex conflict that has festered for months 2: Iran 3: a proxy for Iran