user: Question: What distance did the winning horse run in the Summer Doldrums.
Columns: ['Date', 'Track', 'Race', 'Distance', 'Surface track', 'Winning horse', 'Winning jockey']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['January 1', 'Calder Race Course', 'Tropical Park Derby', '1⅛ Miles', 'Turf', "Soldier's Dancer", 'C. Velázquez']
SQL:

assistant: SELECT "Distance" FROM "Table" WHERE "Winning horse" = 'Summer Doldrums';