instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Natural gas is delivered to homes, where it is used for cooking and heating. Natural gas is also a major energy source for powering turbines to make electricity. Natural gas releases most of its energy as heat when it burns. The power plant is able to use this heat, either in the form of hot gases or steam, to spin turbines. The spinning turbines turn generators, and the generators create electricity. Answer: natural gas
answer:
What type of gas is delivered to homes to use for cooking and heating?

question:
Passage: Blue cheese is blue because of the fungus growing throughout it. Answer: blue
answer:
What color is the fungus in blue cheese?

question:
Passage: In this lesson, you learned some of the ways that humans differ from other mammals. For example, humans have a larger and more complex brain than other mammals. That's why they are also the most intelligent mammals. The next chapter introduces the biology of the human animal. Answer: humans
answer:
What mammal is the most intelligent?