which bi-propellant rocket engines use kerosene and have a dry mass of less than 1125.0?
(AND spaceflight.bipropellant_rocket_engine (AND (JOIN spaceflight.bipropellant_rocket_engine.fuel m.04bhf) (lt spaceflight.rocket_engine.dry_mass 1125.0^^http://www.w3.org/2001/XMLSchema#float)))