what rocket engine runs on kerosene and delivers a thrust in vacuum not exceeding 19600.0?
(AND spaceflight.bipropellant_rocket_engine (AND (lt spaceflight.rocket_engine.thrust_vacuum 19600.0^^http://www.w3.org/2001/XMLSchema#float) (JOIN (R spaceflight.rocket_engine_fuel.rocket_engines) m.04bhf)))