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: The U.N . 's envoy to Iraq , Nickolay Mladenov , urged all armed forces in Tikrit to do their utmost to spare civilians . 2: The offensive also highlights the role played by neighboring Iran in the fight against ISIS . 3: Iraq stages an offensive against ISIS in Tikrit .

1: all armed forces in Tikrit 2: The offensive 3: an offensive