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

Input: Consider Input: According to the english system measurement, 4 cups much is equal to 2 pints, 1 quart, and of a gallon.

Output: According to the english system measurement, how much is equal to 2 pints, 1 quart, and of a gallon?

Input: Consider Input: Environmental changes is most responsible for the extinction of most species of plants and animals that have lived on earth.

Output: What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?

Input: Consider Input: Rock stata is stacked in layers in "layer cake geology".
Output: What is stacked in layers in "layer cake geology"?