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: The Republic of Tajikistan, which declared independence from the Soviet Union in 1991, is in a region that has changed hands many times. Sentence 2: The Soviet Union collapsed in 1991.

0