TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The sun is considered the center of the solar system.

SOLUTION: What is considered the center of the solar system?

PROBLEM: Phosphate groups are found within phospholipids and nucleotides.

SOLUTION: Phosphate groups are found within phospholipids and what else?

PROBLEM: Lipids play several important roles in the human body.

SOLUTION:
What play several important roles in the human body?