Given a scientific passage and an answer, generate a question for the given answer.

Ex Input:
Passage: The range is the total spread of values. It gives you an idea of the variation in the measurements. The range is calculated by subtracting the smallest value from the largest value. For the data in Table above , the range in numbers of vehicles by type is: 150 - 50 = 100. Answer: the range

Ex Output:
What is calculated by subtracting the smallest value from the largest value?

Ex Input:
Passage: Saturated fatty acids have only single bonds between carbon atoms. As a result, the carbon atoms are bonded to as many hydrogen atoms as possible. In other words, the carbon atoms are saturated with hydrogens. Saturated fatty acids are found in fats. Answer: saturated

Ex Output:
Carbon atoms are bonded to as many hydrogen atoms as possible in what type of fatty acids?

Ex Input:
Passage: 7. Compare and contrast the ecosystem concepts of niche and habitat. Answer: ecosystem

Ex Output:
Niche and habitat are concepts related to what broader term?