nema connector has what power plug standard?
Entity
m.08nyvnt
Nema 1-15 unpolarised
class entity
engineering.power_plug_standard m.0ds47w
engineering.power_plug_standard engineering.power_plug_standard_type
Power plug standard NEMA connector
none none
engineering.power_plug_standard.plug_type
Type
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 :engineering.power_plug_standard . 
VALUES ?x1 { :m.0ds47w } 
?x0 :engineering.power_plug_standard.plug_type ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND engineering.power_plug_standard (JOIN engineering.power_plug_standard.plug_type m.0ds47w))