what surface type is on runways that are less than or equal to 15.0 in width at santa cruz island airport?
(AND aviation.airport_runway_surface (JOIN aviation.airport_runway_surface.runways (AND (ge aviation.airport_runway.width 15.0^^http://www.w3.org/2001/XMLSchema#float) (JOIN aviation.airport_runway.airport m.0hybtf4))))