user: ### NOW ANSWER:
Question: Name the number of complement for 4th Hanoverian Brigade
Columns: ['Unit', 'Commander', 'Complement', 'Killed', 'Wounded', 'Missing']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['5th Division', 'Lieutenant General Sir Thomas Picton', '312 off 4792 men', '6 off 84 men', '49 off 531 men', '3 off 27 men']
SQL:

assistant: SELECT COUNT("Complement") FROM "Table" WHERE "Unit" = '4th Hanoverian Brigade';