user: Question: Who were the co-drivers for the Racing Organisation Course team in years before 2011, who had a position of DNF?
Columns: ['Year', 'Team', 'Co-Drivers', 'Class', 'Laps', 'Pos.', 'Class Pos.']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1994.0, 'Michel Hommell', 'Alain Cudini Eric Hélary', 'GT1', 230.0, 'DNF', 'DNF']
SQL:

assistant: SELECT "Co-Drivers" FROM "Table" WHERE "Pos." = 'DNF' AND "Year" < 2011.0 AND "Team" = 'Racing Organisation Course';