user: ### NOW ANSWER:
Question: How many laps did the 6th placed in 1998 complete?
Columns: ['Year', 'Team', 'Co-Drivers', 'Class', 'Laps', 'Pos.', 'Class Pos.']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1983.0, 'Canon Racing GTi Engineering', 'Jonathan Palmer Richard Lloyd', 'C', 339.0, '8th', '8th']
SQL:

assistant: SELECT SUM("Laps") FROM "Table" WHERE "Pos." = '6th' AND "Year" = 1998.0;