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.

[Q]: Sentence: Co2 gas is released into the atmosphere when fossil fuels are burned. Question: What gas is released into the atmosphere when fossil fuels are burned?
[A]: co2

[Q]: Sentence: Most turtle bodies are covered by a special bony or cartilaginous shell developed from their ribs. Question: Most turtle bodies are covered by a special bony or cartilaginous shell developed from their what?
[A]: ribs

[Q]: Sentence: A(n) exoplanet is often discovered because it causes a star to move or to dim. Question: What celestial body is often discovered because it causes a star to move or to dim?
[A]:
exoplanet