user: Question: What is the highest Poles, when Series is ginetta championship, and when Season is before 2007?
Columns: ['Season', 'Series', 'Races', 'Wins', 'Poles', 'F/Laps', 'Podiums', 'Points', 'Position']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'text', 'text']
Sample row: [2000.0, 'British Formula Three', 1.0, 0.0, 0.0, 0.0, 0.0, '0', 'n/a']
SQL:

assistant: SELECT MAX("Poles") FROM "Table" WHERE "Series" = 'ginetta championship' AND "Season" < 2007.0;