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 Input: Sentence: Gases is less dense then either solids or liquids. Question: What is less dense then either solids or liquids?
Example Output: gases

Example Input: Sentence: Mars is the fourth planet from the sun. Question: Which is the fourth planet from the sun?
Example Output: mars

Example Input: Sentence: Three many families are known quarks divided into. Question: How many families are known quarks divided into?
Example Output:
three