Table: 1930 - 31 fa cup
Question: What is the average difference between the number of goals scored by the home team and the away team?
Step 1 (Operation, Indexing): score
Step 2 (Reasoning, Other Commonsense Reasoning): number of goals
Step 3 (Reasoning, Arithmetic): -, difference
Step 4 (Reasoning, Aggregating): AVG, difference
Answer: 0.6