Table: 1999 - 2000 manchester united f.c. season
Question: What is the average attendance of Manchester United F.C. games when they are in first place in the group?
Step 1 (Operation, Indexing): attendance
Step 2 (Operation, Grouping): group position == 1st
Step 3 (Operation, Filter): group position == 1st
Step 4 (Reasoning, Aggregating): AVG, attendance
Answer: 43419.67