SELECT "2011" FROM table_47288 WHERE "2012" = 'grand slam tournaments'
What is the 2011 value of the 2012 grand slam tournaments?
CREATE TABLE table_47288 (
    "Tournament" text,
    "2005" text,
    "2006" text,
    "2007" text,
    "2008" text,
    "2009" text,
    "2010" text,
    "2011" text,
    "2012" text
)