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

Input: Consider Input: Reptiles typically reproduce sexually.

Output: How do reptiles typically reproduce?

Input: Consider Input: Gabbro is a dark dense rock that can be found in the oceanic crust.

Output: Gabbro is a dark dense rock that can be found in what?

Input: Consider Input: Carbon-based compounds are the most common types of compounds found on earth.
Output: What are the most common types of compounds found on earth?