Definition: In this task, you are given two statements. The task is to output whether a given textual premise, i.e. Statement 2, entails or implies a given scientific fact, i.e. Statement 1. The output should be 'entails' if Statement 2 supports Statement 1 and should be 'neutral' otherwise.
Input: Sentence 1: Carbon dioxide does not rise like other gases because it has a density greater than air. Sentence 2: Back-up equipment to clean the air of the poisonous gas was not as effective, which allowed carbon dioxide levels to rise.

neutral