In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
Example: Sentence: Having white fur trait would a cat most likely inherit from its parents. Question: Which trait would a cat most likely inherit from its parents?
Example solution: having white fur
Example explanation: The given output is correct as the answer provided is from the scientific fact stated

Problem: Sentence: Because all animals require an external source of food, they are called heterotrophic. Question: Because all animals require an external source of what, they are called heterotrophic?

Solution: food