user: Question: What is the average Grid, when Time is +45.855?
Columns: ['Rider', 'Manufacturer', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Valentino Rossi', 'Yamaha', 22.0, '44:08.061', 2.0]
SQL:

assistant: SELECT AVG("Grid") FROM "Table" WHERE "Time" = '+45.855';