Claim: 1965 United States Grand Prix (held on October 3, 1965) had 18 drivers, one of whom was Graham Hill.
Evidence: The 1965 United States Grand Prix was a Formula One motor race held on October 3, 1965, at the Watkins Glen Grand Prix Race Course in Watkins Glen, New York. United_Kingdom Graham Hill United_Kingdom Jim Clark United_States Richie Ginther United_Kingdom Mike Spence Italy Lorenzo Bandini United_Kingdom Jackie Stewart Australia Jack Brabham United_States Dan Gurney New_Zealand Bruce McLaren Sweden Jo Bonnier Switzerland Jo Siffert United_States Ronnie Bucknum Austria Jochen Rindt United_States Bob Bondurant Mexico Pedro Rodríguez United_Kingdom Richard Attwood Mexico Moisés Solana United_Kingdom Innes Ireland