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

Input: Consider Input: Water and humidity is the critical factor for the survival of segmented worms.

Output: What is the critical factor for the survival of segmented worms?


Input: Consider Input: The values of strangeness assigned to various particles are based on decay systematics.

Output: The values of strangeness assigned to various particles are based on what?


Input: Consider Input: Four many underlying principles does the science of biology have.


Output: How many underlying principles does the science of biology have?