if you want an optical zoom below 3.0, which digital cameras would be available?
Entity Entity Entity
m.05n8gc5 m.0n1k892 m.03q2jl8
Canon PowerShot A400 GoPro Hero2 Sony DSC-P31
class literal
digicams.digital_camera 3.0^^http://www.w3.org/2001/XMLSchema#float
digicams.digital_camera type.float
Digital Camera 3.0
none <
digicams.digital_camera.optical_zoom
Optical Zoom
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :digicams.digital_camera . 
FILTER (?x1 < "3.0"^^<http://www.w3.org/2001/XMLSchema#float>)
?x0 :digicams.digital_camera.optical_zoom ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND digicams.digital_camera (lt digicams.digital_camera.optical_zoom 3.0^^http://www.w3.org/2001/XMLSchema#float))