kilograms per cubic meter is used as density units in which measurement system?
Entity
m.0c13h
International System of Units
class entity
measurement_unit.measurement_system m.0d1kg
measurement_unit.measurement_system measurement_unit.unit_of_density
Measurement System kilograms per cubic meter
none none
measurement_unit.measurement_system.density_units
Density 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.0d1kg } 
?x0 :measurement_unit.measurement_system.density_units ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND measurement_unit.measurement_system (JOIN measurement_unit.measurement_system.density_units m.0d1kg))