user: Question: What is the acquis chapter open/closed dates with a membership application in 2009-04-28?
Columns: ['State', 'Status', 'Association Agreement', 'Membership Application', 'Candidate status', 'Negotiations start', 'Screening completed', 'Acquis Chapters open/closed']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Albania', 'Applicant', '2009-04-01 ( SAA )', '2009-04-28', '–', '–', '–', '–']
SQL:

assistant: SELECT "Acquis Chapters open/closed" FROM "Table" WHERE "Membership Application" = '2009-04-28';