Definition: In this task, you're given two sentences. Indicate if the first sentence clearly entails the second sentence (i.e., one can conclude the 2nd sentence by reading the 1st one). Indicate your answer with '1' if the first sentence entails the second sentence, otherwise answer with '0'.
Input: Sentence 1: O'Connor then fought on the side of the Republicans in the 1921-22 Civil War, with those who favored rejection of the treaty which brought peace between Ireland and Britain, but at the cost of a divided island. Sentence 2: Ireland has been divided since 1921.

0