If a paper takes up an approach to solve a problem, isn't that what makes up the primary research questions it is trying to address? I have been assigned to read a paper and answer a couple of questions based on it. One of the questions is to identify the problem the paper is trying to solve, and another question asks about the primary research questions it answers. I am confused as to what's the difference between these two.
Edit:
The paper is from the domain of artificial intelligence. The problem domain it belongs to is concerned with natural language processing. This domain poses a lot of problems, the paper just picked up one of them and I get that that's the "problem" it is trying to solve. How is a primary research question different from this?