user: Question: What Tournament did Silva Partner with Nicole Thijssen with Opponent in the final Nina Bratchikova & Frederica Piedade?
Columns: ['Date', 'Tournament', 'Surface', 'Partner', 'Opponent in the final', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['23 June 2002', 'Montemor-o-Novo', 'Hard', 'Carlota Santos', 'Alberta Brianti & Frederica Piedade', '6–4, 6–2']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "Partner" = 'Nicole Thijssen' AND "Opponent in the final" = 'Nina Bratchikova & Frederica Piedade';