user: Question: What is the average laps for the +50.653 time?
Columns: ['Rider', 'Bike', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Carlos Checa', 'Honda CBR1000RR', 21.0, "38'44.105", 1.0]
SQL:

assistant: SELECT AVG("Laps") FROM "Table" WHERE "Time" = '+50.653';