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: Many species of birds in new england fly south for the winter months to find an environment with more food. Sentence 2: When the weather begins to cool off in the fall, the birds fly south to find warm winter weather and plenty of food.
entails

Sentence 1: You call sound that has a wave frequency higher than the human ear can detect ultrasound. Sentence 2: Ultrasound Sound waves that are inaudible to the human ear.
entails

Sentence 1: Ion drives have low thrust but high efficiency. Sentence 2: The experimental aluminium-ion battery possessed a high voltage efficiency, having a large output voltage during operation.

neutral