user: Question: What is Builder, when Date is 1953?
Columns: ['Number', 'Builder', 'Type', 'Date', 'Works number']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['51', 'Baldwin Locomotive Works', 'DS4-4-750', '1949', '74408']
SQL:

assistant: SELECT "Builder" FROM "Table" WHERE "Date" = '1953';