user: Question: What 500 yard Freestyle has a Combined of Palo Verde, and a 100 yard Butterfly of Edward Kollar (Douglas)?
Columns: ['Combined', '50 yard Freestyle', '100 yard Freestyle', '200 yard Freestyle', '500 yard Freestyle', '100 yard Backstroke', '100 yard Butterfly']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Palo Verde', 'Martin Vanis (Coronado)', 'Jay Sirat (Palo Verde)', 'Zane Grothe (Boulder City)', 'Zane Grothe (Boulder City)', 'Johnny Funk (SECTA)', 'Martin Vanis (Coronado)']
SQL:

assistant: SELECT "500 yard Freestyle" FROM "Table" WHERE "Combined" = 'Palo Verde' AND "100 yard Butterfly" = 'Edward Kollar (Douglas)';