user: Question: What date was the ensemble in North East England closed?
Columns: ['Region', 'Operator', 'Licence award date', 'On air date', 'Closure date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Central Scotland', 'Switch Digital', '6 October 2000', 'June 2001', 'N/A']
SQL:

assistant: SELECT "Closure date" FROM "Table" WHERE "Region" = 'North East England';