user: Question: what was the builder in 1929
Columns: ["'Name' or designation", 'Wheel arrangement', 'Builder', 'Year built', 'Year withdrawn']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Theakston Fordson', "Bo'2'", 'Theakston', '1928', 'c1935']
SQL:

assistant: SELECT "Builder" FROM "Table" WHERE "Year built" = '1929';