user: Question: Who is the builder for br no. 31779?
Columns: ['SECR No.', 'SR No.', 'BR No.', 'Builder', 'Date Delivered', 'Date Withdrawn']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [760.0, 1760.0, 31760.0, 'Beyer Peacock', 'Cannot handle non-empty timestamp argument! 1914', 'Cannot handle non-empty timestamp argument! 1961']
SQL:

assistant: SELECT "Builder" FROM "Table" WHERE "BR No." = 31779.0;