user: Question: What is the name of the person that was appointed on 13 May 2009?
Columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Replaced by', 'Date of appointment']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1. FC Nuremberg', 'Thomas von Heesen', 'Resigned', '28 August 2008', 'Michael Oenning', '5 September 2008']
SQL:

assistant: SELECT "Replaced by" FROM "Table" WHERE "Date of appointment" = '13 May 2009';