Problem 1: What headings or labels are used on it? What does this tell about each paper? What is expected to be found within the paper? What headings or labels are used on it? What does this tell you about each paper? What do you expect to find within the paper?
Problem 2: What can be learned from the abstract about the following, background, methods (if there are any), results (if any), and conclusions?
Problem 3: Rewrite methods described in abstracts.