Table:
text: 1973 Formula One season
Championship drivers and constructors
Championship drivers and constructors
Entrant Constructor_ Chassis Engine Tyre Driver Rounds
Clarke-Mordaunt-Guthrie Racing Team Pierre Robert March - Ford 721G 731 Ford Cosworth DFV 3.0 V8 F G Mike Beuttler 1-7, 9-15
Clarke-Mordaunt-Guthrie Racing Team Pierre Robert March - Ford 721G 731 Ford Cosworth DFV 3.0 V8 F G Reine Wisell 7-8
STP March Racing Team March - Ford 721G 731 Ford Cosworth DFV 3.0 V8 G Jean-Pierre Jarier 1-3, 5-8, 12, 14-15
STP March Racing Team March - Ford 721G 731 Ford Cosworth DFV 3.0 V8 G Henri Pescarolo 4
STP March Racing Team March - Ford 721G 731 Ford Cosworth DFV 3.0 V8 G Roger Williamson 9-10
Brooke Bond Oxo Team Surtees Surtees - Ford TS9A TS9B TS14A Ford Cosworth DFV 3.0 V8 F Mike Hailwood All

Question: None of the rounds during the 1973 Drivers' and Constructors' Championship has Roger Williamson as a driver in the 1973 Formula One season. ?