user: Question: Who is the replaced by when the date of vacancy is 27 December 2010?
Columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Replaced by', 'Date of appointment']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['MKE Ankaragücü', 'Roger Lemerre', 'Mutual consent', '23 May 2010', 'Ümit Özat', '24 May 2010']
SQL:

assistant: SELECT "Replaced by" FROM "Table" WHERE "Date of vacancy" = '27 December 2010';