user: Question: Who was the Europe/Africa Group I's opponent?
Columns: ['Edition', 'Zone', 'Round', 'Date', 'Against', 'Surface', 'Opponent', 'Outcome', 'Result']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 'Europe/Africa Group I C', '1R', '21 April 2005', 'Slovenia', 'Clay', 'Tina Pisnik', 'Loss', '6–0, 6–1']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Zone" = 'Europe/Africa Group I';