Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_47923 ( "Team" text, "Outgoing manager" text, "Manner of departure" text, "Date of vacancy" text, "Replaced by" text, "Date of appointment" text, "Position in table" text )

### Question ###
What is the date of appointment of outgoing manager fred rutten, who had a sacked manner of departure?

### Accurate SQL ###

SELECT "Date of appointment" FROM table_47923 WHERE "Manner of departure" = 'sacked' AND "Outgoing manager" = 'fred rutten'