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: Bases are antacids comprised of. Question: What are antacids comprised of?
Example Output: bases

Example Input: Sentence: Solar and wind are still expensive compared to fossil fuels. Question: Solar and wind are still expensive compared to what?
Example Output: fossil fuels

Example Input: Sentence: Incubation is when birds keep their eggs warm while the embryos inside develop. Question: What is it called when birds keep their eggs warm while the embryos inside develop?
Example Output:
incubation