Teacher: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Earth rotates on its axis once times in one day.
Solution: How many times does Earth rotate on its axis in one day?
Reason: The given output correctly poses a question based on the scientific fact given.

Now, solve this instance: Collision frequency is greater for homogeneous category of catalysts, which also tend to be more sensitive to temperature and more 'expensive'.
Student:
Collision frequency is greater for what category of catalysts, which also tend to be more sensitive to temperature and more 'expensive'?