user: Question: Rich round hAs An H/A of A And the opponent Sheffield United?
Columns: ['Date', 'Round', 'Opponents', 'H / A', 'Result F – A', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['9 January 1994', 'Round 3', 'Sheffield United', 'A', '1 – 0', 22019.0]
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "H / A" = 'A' AND "Opponents" = 'Sheffield United';