Which driver won the i race of champions?
{'header': ['Race Name', 'Circuit', 'Date', 'Winning driver', 'Constructor', 'Report'], 'page_title': '1965 Formula One season', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-1140099-6', 'section_title': 'Non-Championship race results', 'caption': 'Non-Championship race results', 'rows': [['II Cape South Easter Trophy', 'Killarney', '9 January', 'Paul Hawkins', 'Brabham - Climax', 'Report'], ['I Race of Champions', 'Brands Hatch', '13 March', 'Mike Spence', 'Lotus - Climax', 'Report'], ['XIV Syracuse Grand Prix', 'Syracuse', '4 April', 'Jim Clark', 'Lotus - Climax', 'Report'], ['I Sunday Mirror Trophy', 'Goodwood', '19 April', 'Jim Clark', 'Lotus - Climax', 'Report'], ['XVII BRDC International Trophy', 'Silverstone', '15 May', 'Jackie Stewart', 'BRM', 'Report'], ['IV Mediterranean Grand Prix', 'Pergusa', '15 August', 'Jo Siffert', 'Brabham - BRM', 'Report']], 'name': 'table_1140099_6'}