user: Question: Which Built by has a Name of Northern Jaeger?
Columns: ['Name', 'Length', 'Tonnage', 'Built by', 'Year', 'Engines', 'Horsepowers', 'Former Names']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'real', 'text']
Sample row: ['American Dynasty', '272.0 Feet', 3471.0, 'Mangone Shipyard, Houston, TX.', 1974.0, '2, Bergen Diesel , BRM-8', 8000.0, 'Artabaze, Bure, Sea Bure']
SQL:

assistant: SELECT "Built by" FROM "Table" WHERE "Name" = 'Northern Jaeger';