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: Perhaps there is no expansion, at least not due to a big bang which never happened. About 20 years ago, Halton Arp and John Bahcall published a debate in The Redshift Controversy, presenting both sides of the argument. Sentence 2: We estimate that the Big Bang happened 20 years ago.

0