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 delivers power to the chemical factory chloroplasts.

SOLUTION: What delivers power to the chemical factory chloroplasts?

PROBLEM: The newest, outer layers of secondary xylem are called sapwood.

SOLUTION: What are the newest, outer layers of secondary xylem called?

PROBLEM: The element hydrogen is the most abundant in the universe.

SOLUTION:
What element is the most abundant in the universe?