user: Question: Name the surface for Cara Black Rennae Stubbs
Columns: ['Outcome', 'Year', 'Championship', 'Surface', 'Partner', 'Opponents', 'Score']
Types: ['text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', 2002.0, 'Berlin', 'Clay', 'Arantxa Sánchez Vicario', 'Elena Dementieva Janette Husárová', '6–0, 6–7, 2–6']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Opponents" = 'Cara Black Rennae Stubbs';