http://caligraph.org/ontology/Engine_introduced_in_the_1920s

CaLiGraph

Property	Value
rdf:type	owl:Class
rdfs:label	Engine introduced in the 1920s
rdfs:subClassOf	Engine
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Category:Engines_introduced_in_the_1920s
is rdfs:subClassOf of	1920s aircraft piston engine

About: clgo:Engine_introduced_in_the_1920s