what roller coasters last less than 90.0 and have a capacity of 800?
(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 800^^http://www.w3.org/2001/XMLSchema#integer)))