user: Question: What is the surface of the match when the opponent was Iryna Bremond Valeria Savinykh?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponents', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner–up', '28 May 2006', 'Budapest', 'Clay', 'Georgie Stoop', 'Antonia Xenia Tout Nataša Zorić', '1-6 2-6']
SQL:

assistant: SELECT "Surface" FROM "Table" WHERE "Opponents" = 'Iryna Bremond Valeria Savinykh';