user: Question: Who was the Builder when the wheels were 4-4-0 and the railway was GCR?
Columns: ['Railway', 'Builder', 'Built', 'Wheels', 'Location', 'ObjectNumber']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['SECR', 'SECR Ashford', '1901', '4-4-0', 'York', '1975-7006']
SQL:

assistant: SELECT "Builder" FROM "Table" WHERE "Wheels" = '4-4-0' AND "Railway" = 'GCR';