user: Question: What functions were released on 2011-06-23? 
Columns: ['Title', 'Developer', 'Category', 'Function', 'Release date', 'Version']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Calendar', 'Matchbox', 'Utilities', 'Virtual calendar and scheduler.', '2011-07-29', '1.0.0.3']
SQL:

assistant: SELECT "Function" FROM "Table" WHERE "Release date" = '2011-06-23';