user: Question: What is the earliest date when the championship was Monterrey WCT, Mexico?
Columns: ['Outcome', 'Date', 'Championship', 'Surface', 'Opponent', 'Score']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', 1974.0, 'Salt Lake City , US', 'Indoors', 'Jimmy Connors', '6–4, 6–7, 3–6']
SQL:

assistant: SELECT MIN("Date") FROM "Table" WHERE "Championship" = 'Monterrey WCT, Mexico';