user: Question: Who was the winner of the Miami tournament where Elena Dementieva was a finalist?
Columns: ['Tournament', 'Surface', 'Week', 'Winner', 'Finalist', 'Semifinalists']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Tokyo', 'Carpet (i)', 'February 2', 'Lindsay Davenport 6–4, 6–1', 'Magdalena Maleeva', 'Chanda Rubin Jelena Dokić']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Finalist" = 'Elena Dementieva' AND "Tournament" = 'Miami';