user: Question: What shows for 2006, when 2013 is 2–4?
Columns: ['Tournament', '2006', '2009', '2012', '2013']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Australian Open', '1R', '1R', '1R', '1R']
SQL:

assistant: SELECT "2006" FROM "Table" WHERE "2013" = '2–4';