user: Question: What is the team when the date of appointment is 23 March 2011?
Columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Incoming manager', 'Date of appointment', 'Position in Table']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Hereford United', 'Graham Turner', 'Resigned', '16 April 2010', 'Simon Davey', '22 June 2010', 'Pre-Season']
SQL:

assistant: SELECT "Team" FROM "Table" WHERE "Date of appointment" = '23 March 2011';