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: Cloud of these can make a shadow on the ground during the day. Question: Which of these can make a shadow on the ground during the day?
Example Output: Cloud

Example Input: Sentence: Particles of sand and rock are carried by longshore drift. Question: Particles of sand and what other substance are carried by longshore drift?
Example Output: rock

Example 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?
Example Output:
density