user: Question: Which Opponent has a H / a of a, and a Result F – a of 2 – 0, and a attendance larger than 30000?
Columns: ['Date', 'Opponents', 'H / A', 'Result F – A', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['6 September 1902', 'Gainsborough Trinity', 'A', '1 – 0', 4000.0]
SQL:

assistant: SELECT "Opponents" FROM "Table" WHERE "H / A" = 'a' AND "Result F – A" = '2 – 0' AND "Attendance" > 30000.0;