user: Question: What is the high lap total for a grid less than 6, and a Time/Retired of Halfshaft?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Damon Hill', 'Williams - Renault', 69.0, '1:36:03.465', 1.0]
SQL:

assistant: SELECT MAX("Laps") FROM "Table" WHERE "Grid" < 6.0 AND "Time/Retired" = 'Halfshaft';