How many sets were in the 2011 Australian Open Tournament?
CREATE TABLE table_14542 (
    "Tournament" text,
    "2007" text,
    "2008" text,
    "2009" text,
    "2011" text,
    "2012" text,
    "2013" text
)
SELECT "2011" FROM table_14542 WHERE "Tournament" = 'australian open'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many sets were in the 2011 Australian Open Tournament? ### Input: CREATE TABLE table_14542 (
    "Tournament" text,
    "2007" text,
    "2008" text,
    "2009" text,
    "2011" text,
    "2012" text,
    "2013" text
) ### Response: SELECT "2011" FROM table_14542 WHERE "Tournament" = 'australian open'