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_47844 ( "Tournament" text, "1998" text, "1999" text, "2000" text, "2001" text, "2002" text, "2003" text, "2004" text, "2005" text, "2006" text, "2007" text, "2008" text, "2009" text, "2010" text, "2011" text, "2012" text, "2013" text )

### Question ###
what is 2013 when 2001 is qf and 2011 is 4r?

### Accurate SQL ###

SELECT "2013" FROM table_47844 WHERE "2001" = 'qf' AND "2011" = '4r'