instruction: Reported Offenses larger than 216, and a U.S. Rate smaller than 3274, and a Texas Rate smaller than 2688.9, and a Crime of violent crime has what killeen rate?
response: SELECT SUM("Killeen Rate") FROM table_39425 WHERE "Reported Offenses" > '216' AND "U.S. Rate" < '3274' AND "Texas Rate" < '2688.9' AND "Crime" = 'violent crime'