user: Question: What velodrome took place earlier than 1950 with a winner from France in tandem paced over a distance of 951.750 km?
Columns: ['Year', 'Rider', 'Country', 'Distance', 'Pacing', 'Velodrome']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1894.0, 'Constant Huret', 'France', '736.946\u2009km', 'tandem paced', 'Vélodrome Buffalo']
SQL:

assistant: SELECT "Velodrome" FROM "Table" WHERE "Year" < 1950.0 AND "Country" = 'France' AND "Pacing" = 'tandem paced' AND "Distance" = '951.750 km';