instruction:
In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.
question:
What are the two types of mixtures in science?
answer:
What is the type of mixtures in science in which its constituents are distributed uniformly?


question:
Who is playing batman in the justice league movie?
answer:
Who is playing batman in the 2017 justice league movie?


question:
Who said all living things are composed of cells?
answer:

Who said all living things are composed of cells, credited with the cell theory?