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 73-year-old University of Oklahoma president was also a former governor , former U.S . senator and Rhodes scholar . 2: Boren is the first person in Oklahoma history to have served all three positions , according to his university biography . 3: Boren is the first person in Oklahoma history to serve as governor , senator and OU president .

1: The 73-year-old University of Oklahoma president 2: Boren 3: Boren