user: Question: What is the date of the British Rail Class 111 TSLRB description?
Columns: ['Number & Name', 'Description', 'Livery', 'Owner(s)', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Operational', 'Operational', 'Operational', 'Operational', 'Operational']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Description" = 'British Rail Class 111 TSLRB';