Table: crime_stats_usa_2
Columns: state
city
population
violent_crime
murder_and_non_negligent_manslaughter
forcible_rape
robbery
aggravated_assault
property_crime
burglary
larceny_theft
motor_vehicle_theft

Question: What is the smallest rate of burglary when forcible rape is 39.1 and motor vehicle theft is less than 568.8?
SQL: SELECT MIN("burglary") FROM crime_stats_usa_2 WHERE "forcible_rape" = '39.1' AND "motor_vehicle_theft" < 568.8