Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Most hormones are produced by the endocrine system.

Output: Most hormones are produced by which human organ system?


Input: Consider Input: Lipids are available to the body from three sources.

Output: Lipids are available to the body from how many sources?


Input: Consider Input: Climate is the long-term average of weather in a particular spot.
Output: What is the long-term average of weather in a particular spot called?