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 maker of a promising ovarian cancer drug said, Friday, that he stopped enrolling women in a study because several patients developed gastrointestinal holes. Sentence 2: A study of a promising cancer drug was stopped because of a serious side effect.

1