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

Ex Input:
A student should use a balance to compare the masses of two small rocks.

Ex Output:
Which tool should a student use to compare the masses of two small rocks?


Ex Input:
Rna analysis type of analysis is performed to study gene expression patterns in cells.

Ex Output:
What type of analysis is performed to study gene expression patterns in cells?


Ex Input:
In a medium, the closer the distribution of the material gets to equilibrium state, the slower the rate of diffusion becomes.

Ex Output:

In a medium, the closer the distribution of the material gets to what state, the slower the rate of diffusion becomes?