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.

Sentence 1: Ectothermic vertebrates control body temperature to just a limited extent from the outside by changing behavior. Sentence 2: Cold-blooded  or ectothermic animals like reptiles or fish have body temperatures that change according to the surrounding temperature.
entails

Sentence 1: When electrons are shared equally, it is called nonpolar bonds. Sentence 2: If the atoms share electrons equally, the bond is non-polar.
entails

Sentence 1: Heart valves prevent the backflow of blood from happening in the heart. Sentence 2: Backflow of blood in the heart is prevented by four valves made of flaps of connective tissue.

entails