Table: 2008 - 09 uefa cup
Question: How many teams in the 2008 - 09 UEFA Cup had a one-goal aggregate score difference in the first leg and second leg?
Step 1 (Reasoning, Arithmetic): -, score difference
Step 2 (Operation, Filter): score difference
Step 3 (Reasoning, Aggregating): COUNT, team 1
Step 4 (Reasoning, Aggregating): COUNT, team 2
Answer: 7