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: In 2013 , tensions between the world powers and Iran began to thaw a bit after the election of reformist Iranian President Hassan Rouhani , who pledged to end the crippling weight of international sanctions on Iran 's economy . 2: But this interim agreement has been extended twice over a failure of the parties to meet previous deadlines for a final deal . 3: Interim deal from 2013 between six world powers and Iran has been extended twice .

1: the world powers and Iran 2: the parties 3: six world powers and Iran