what is the unit of power in the measurement system which includes ampere per metre?
Entity Entity Entity Entity
m.09hl5 g.1226mnjx m.02kdm16 g.120ylmh4
Watt Megawatt Milliwatt Kilowatt
class class entity
measurement_unit.power_unit measurement_unit.measurement_system m.02sj414
measurement_unit.power_unit measurement_unit.measurement_system measurement_unit.magnetic_field_strength_unit
Unit of Power Measurement System Ampere per metre
none none none
measurement_unit.power_unit.measurement_system measurement_unit.measurement_system.magnetic_field_strength_units
Measurement System Magnetic Field Strength 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.power_unit . 
?x1 :type.object.type :measurement_unit.measurement_system . 
VALUES ?x2 { :m.02sj414 } 
?x0 :measurement_unit.power_unit.measurement_system ?x1 . 
?x1 :measurement_unit.measurement_system.magnetic_field_strength_units ?x2 . 
FILTER ( ?x0 != ?x1 && ?x0 != ?x2 && ?x1 != ?x2  )
}
}
(AND measurement_unit.power_unit (JOIN measurement_unit.power_unit.measurement_system (JOIN measurement_unit.measurement_system.magnetic_field_strength_units m.02sj414)))