conductivity is measured by what instrument?
Entity
m.02rbfch
Electrical conductivity meter
class entity
measurement_unit.measuring_instrument m.05zn843
measurement_unit.measuring_instrument measurement_unit.dimension
Measuring Instrument Conductivity
none none
measurement_unit.measuring_instrument.dimension_measured
Dimension measured
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.measuring_instrument . 
VALUES ?x1 { :m.05zn843 } 
?x0 :measurement_unit.measuring_instrument.dimension_measured ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND measurement_unit.measuring_instrument (JOIN measurement_unit.measuring_instrument.dimension_measured m.05zn843))