user: Question: The event WC Rio de Janeiro with a total of 16 has what as rank points?
Columns: ['Shooter', 'Event', 'Rank points', 'Score points', 'Total']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Vladimir Isakov ( RUS )', 'WCF 2007', 'Defending champion', 'Defending champion', 'Defending champion']
SQL:

assistant: SELECT "Rank points" FROM "Table" WHERE "Event" = 'WC Rio de Janeiro' AND "Total" = '16';