user: Question: Who was the architect that built the Electric Railway Chambers before 1915?
Columns: ['Building', 'Height [m]', 'Floors', 'Built', 'City', 'Architect']
Types: ['text', 'real', 'real', 'real', 'text', 'text']
Sample row: ["Eaton's Department Store *", 46.0, 9.0, 1904.0, 'Winnipeg', 'John Woodman']
SQL:

assistant: SELECT "Architect" FROM "Table" WHERE "Built" < 1915.0 AND "Building" = 'Electric Railway Chambers';