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: An experiment is a controlled scientific test that often takes place in a lab. Question: What is a controlled scientific test that often takes place in a lab?
Example Output: an experiment

Example Input: Sentence: A wall of rocks or concrete a called a groin. Question: What is a wall of rocks or concrete called?
Example Output: groin

Example Input: Sentence: Cigarettes are a major source of carcinogens, a kind of chemical substances linked with cancer. Question: Cigarettes are a major source of what kind of chemical substances linked with cancer?
Example Output:
carcinogens