Table: 1994 open championship
Question: What is the average score difference between the players who finished in the top 4 and the players who finished outside the top 4 at the 1994 open championship?
Step 1 (Operation, Indexing): score
Step 2 (Operation, Grouping): Top-4 or not
Step 3 (Reasoning, Aggregating): AVG, score
Step 4 (Reasoning, Arithmetic): -, average score
Answer: 3.583