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.

Input: Consider Input: Sentence: Toxins is contained in the skin of brightly colored poison dart frogs. Question: What is contained in the skin of brightly colored poison dart frogs?

Output: toxins

Input: Consider Input: Sentence: Density describes how much matter is in a certain amount of space. Question: What describes how much matter is in a certain amount of space?

Output: density

Input: Consider Input: Sentence: Very low density is the concentration of gas molecules in the mesosphere. Question: What is the concentration of gas molecules in the mesosphere?
Output: very low density