the cable length is a frame for measurement in what system?
Entity Entity Entity
m.03zt2 m.07s8j1 m.07s8kh
Imperial unit system Finnish obsolete units of measurement Norwegian units of measurement
class entity
measurement_unit.measurement_system m.018cl3
measurement_unit.measurement_system measurement_unit.distance_unit
Measurement System Cable length
none none
measurement_unit.measurement_system.length_units
Length Units
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 :measurement_unit.measurement_system . 
VALUES ?x1 { :m.018cl3 } 
?x0 :measurement_unit.measurement_system.length_units ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND measurement_unit.measurement_system (JOIN measurement_unit.measurement_system.length_units m.018cl3))