user: ### NOW ANSWER:
Question: What value for 2013 corresponds to the US Open Tournament?
Columns: ['Tournament', '2007', '2011', '2012', '2013']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Grand Slam Tournaments', 'Grand Slam Tournaments', 'Grand Slam Tournaments', 'Grand Slam Tournaments', 'Grand Slam Tournaments']
SQL:

assistant: SELECT "2013" FROM "Table" WHERE "Tournament" = 'US Open';