Table: 1903 cahl season
Question: What is the average goal difference between teams with the same number of wins in the 1903 cahl season?
Step 1 (Operation, Filter): wins
Step 2 (Reasoning, Other Commonsense Reasoning): goal difference
Step 3 (Reasoning, Arithmetic): -, goal difference
Step 4 (Reasoning, Aggregating): AVG, average goal difference
Answer: 18