user: ### NOW ANSWER:
Question: What is the rank 6 lowest win who's first win was at the 1950 British Grand Prix?
Columns: ['Rank', 'Engine', 'Wins', 'First win', 'Latest win']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [1.0, 'Ferrari', 222.0, '1951 British Grand Prix', '2013 Spanish Grand Prix']
SQL:

assistant: SELECT MIN("Wins") FROM "Table" WHERE "Rank" > 6.0 AND "First win" = '1950 British Grand Prix';