<https://w3id.org/italia/env/ld/common/year/1991> <https://w3id.org/italia/env/onto/top/year> "1991"^^<http://www.w3.org/2001/XMLSchema#gYear> .
<https://w3id.org/italia/env/ld/common/year/1991> <http://www.w3.org/2000/01/rdf-schema#label> "1991" .
<https://w3id.org/italia/env/ld/common/year/1991> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <https://w3id.org/italia/env/onto/top/Year> .