user: Question: What is Updated In Past 30 Days, when Registration is "Open to people 13 and over"?
Columns: ['Name', 'Year Began', 's Registered user', 'Updated in past 30 days', 'Registration', 'Ability to syndicate off-site feeds', 'Userpics Free', 'Userpics Paid', 'Monthly Cost for Paid Account', 'Yearly Cost for Paid Account', 'Permanent Account']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Asks', '2006', '13127', '31', 'Open', 'Unknown', '3', 'Unknown', 'Unknown', 'Unknown', 'Unknown']
SQL:

assistant: SELECT "Updated in past 30 days" FROM "Table" WHERE "Registration" = 'Open to people 13 and over';