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.

Q: Sentence 1: Valence is the term for the number of covalent bonds an atom can form. Sentence 2: The total number of bonds formed by an atom is called the valence of the atom.

A: entails
****
Q: Sentence 1: The combustion of propane gas produces carbon dioxide and water vapor. Sentence 2: Perfect combustion of propane yields water, carbon dioxide &amp; heat.

A: entails
****
Q: Sentence 1: Instinctive behaviors like flying and mating types of incest behaviors are controlled by genes. Sentence 2: Incest behavior and incest taboo.

A:
neutral
****