user: Question: Which Livery has a Description of 20T Tanker, with a date later than 1941?
Columns: ['Number & name', 'Description', 'Current status', 'Livery', 'Date']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Scottish Tar Distillers No. 78', 'Rectangular Tanker', 'Static display in the museum.', 'Black', 1877.0]
SQL:

assistant: SELECT "Livery" FROM "Table" WHERE "Description" = '20T Tanker' AND "Date" > 1941.0;