user: Question: Tell me the number range for 1965-66
Columns: ['Class', 'Type', 'No. built (Converted*)', 'Year built (Converted*)', 'No. range', 'Withdrawn']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Class 420', '4Big', '18', '1965-66', '7031-7048', 1986.0]
SQL:

assistant: SELECT "No. range" FROM "Table" WHERE "Year built (Converted*)" = '1965-66';