user: Question: What is the Speed at Lake Mead?
Columns: ['Speed', 'Craft', 'Pilot', 'Location', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['mph (km/h)', 'Bluebird K7', 'Donald Campbell', 'Ullswater', '23 July 1955']
SQL:

assistant: SELECT "Speed" FROM "Table" WHERE "Location" = 'Lake Mead';