user: Question: Which Date has Opponents in the final of Valeria Casillo Lilly Raffa?
Columns: ['Outcome', 'Date', 'Tournament', 'Surface', 'Partner', 'Opponents in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '13 May 2001', 'Swansea , Wales', 'Clay', 'Maria Bobedova', 'Natalia Egorova Ekaterina Sysoeva', '6–4 6–7 (5–7) 0–6']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponents in the final" = 'Valeria Casillo Lilly Raffa';