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

Ex Input:
Zero is the net force acting on an object when two equal forces are applied from opposite directions.

Ex Output:
What is the net force acting on an object when two equal forces are applied from opposite directions?

Ex Input:
A theory is another name for a broad explanation that is supported by a great deal of evidence.

Ex Output:
What is another name for a broad explanation that is supported by a great deal of evidence?

Ex Input:
Volcanoes do convergent plate boundaries with trenches have.

Ex Output:
What do convergent plate boundaries with trenches have?