TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The cell starting meiosis is called a primary oocyte.

SOLUTION: The cell starting meiosis is called a what?

PROBLEM: Water seeping into the ground is known as infiltration.

SOLUTION: Water seeping into the ground is known as?

PROBLEM: Because of their reactivity, we do not find most representative metals as free elements in nature.

SOLUTION:
Because of their reactivity, we do not find most representative metals as free elements where?