user: Question: in what round types did the opponent come from South Africa?
Columns: ['Edition', 'Zone', 'Round', 'Against', 'Surface', 'Partner', 'Opponents', 'Outcome', 'Result']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 'Fed Cup Europe/Africa Group I C', 'Round Robin', 'Serbia and Montenegro', 'Clay', 'Karina-Ildor Jacobsgaard', 'Jelena Janković Nataša Zorić', 'Loss', '6–2, 6–2']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Against" = 'South Africa';