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: Irbil , Iraq ( CNN ) ISIS claimed it controlled part of Iraq 's largest oil refinery Sunday , posting images online that purported to show the storming of the facility , fierce clashes and plumes of smoke rising above the contested site . 2: It would n't be the first time that militants and Iraqi forces have battled over the refinery , a key strategic resource that has long been a lucrative target because the facility refines much of the fuel used by Iraqis domestically . 3: The refinery , Iraq 's largest , has long been a lucrative target for militants .

1: Iraq 's largest oil refinery 2: a lucrative target 3: The refinery , Iraq 's largest