user: Question: How many rounds were there in Karlskoga Motorstadion with Roger Eriksson at the pole position?
Columns: ['Round', 'Circuit/Location', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Winning Team', 'Highest Scoring Team', 'Winning Privateer']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Mantorp Park', 'Robert Dahlgren', 'Robert Dahlgren', 'Robert Dahlgren', 'Polestar Racing', 'Flash Engineering', 'Johan Kristoffersson']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "Circuit/Location" = 'Karlskoga Motorstadion' AND "Pole Position" = 'Roger Eriksson';