user: Question: What is the average lap time for retired time of +23.707 and a Grid greater than 21?
Columns: ['Rider', 'Manufacturer', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Tomoyoshi Koyama', 'KTM', 22.0, '41:06.339', 7.0]
SQL:

assistant: SELECT AVG("Laps") FROM "Table" WHERE "Time/Retired" = '+23.707' AND "Grid" > 21.0;