user: Question: what is the tournament on July 23, 2006?
Columns: ['Date', 'Tournament', 'Surface', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['July 11, 2005', 'Elche , Spain', 'Clay', 'Gabriel Trujillo-Soler', '6–3, 3–6, 6–3']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "Date" = 'July 23, 2006';