Table: list of schools in the manawatu - wanganui region
Question: What is the average Roll size of schools with Decile of 4 in the Manawatu-Wanganui region?
Step 1 (Operation, Indexing): decile
Step 2 (Operation, Filter): decile
Step 3 (Operation, Indexing): roll
Step 4 (Reasoning, Aggregating): AVG, roll
Answer: 290