CREATE TABLE table_37577 ("Name" TEXT, "Style" TEXT, "Opened" FLOAT, "Manufacturer" TEXT, "Themed Area" TEXT)

Which Opened is the highest one that has a Themed Area of aerial park, and a Manufacturer of zamperla?
SELECT MAX("Opened") FROM table_37577 WHERE "Themed Area" = 'aerial park' AND "Manufacturer" = 'zamperla'
SELECT MAX("Opened") FROM "table_37577" WHERE "Manufacturer" = 'zamperla' AND "Themed Area" = 'aerial park'