user: Question: What event has 8 as the rank points, with 20 as the total?
Columns: ['Shooter', 'Event', 'Rank points', 'Score points', 'Total']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Zhu Qinan ( CHN )', 'WCF 2007', 'Defending champion', 'Defending champion', 'Defending champion']
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Rank points" = '8' AND "Total" = '20';