/Users/michele.pasin/dev2/ontospy-examples/rdf/schemaorg-30.1.ttl
http://ogp.me/ns#video
rdf:Property
@prefix og: <http://ogp.me/ns#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . og:video a rdf:Property .