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 two nations have barely been on speaking terms -- officially -- for more than 50 years . 2: Cuba and the United States had endured a half-century of enmity , the tension worsened by the two nations being only 90 miles apart . 3: The two nations -- only 90 miles apart -- have been at odds for more than 50 years .

1: more than 50 years 2: a half-century 3: more than 50 years