user: Question: What description does Livery of EWS have?
Columns: ['Number & name', 'Description', 'Current status', 'Livery', 'Date']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['No. 20020', 'BR Bo-Bo Class 20', 'Operational.', 'BR Blue', 1959.0]
SQL:

assistant: SELECT "Description" FROM "Table" WHERE "Livery" = 'EWS';