which roller coaster that last less than 90.0 have a capacity of 500?
(AND amusement_parks.roller_coaster (AND (le amusement_parks.ride.duration 90.0^^http://www.w3.org/2001/XMLSchema#float) (JOIN amusement_parks.ride.capacity 500^^http://www.w3.org/2001/XMLSchema#integer)))