user: Question: Name the sum of attendance for Round 3
Columns: ['Date', 'Round', 'Opponents', 'Result F–A', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['8 January 2005', 'Round 3', 'Exeter City', '0–0', 67551.0]
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "Round" = 'Round 3';