<https://w3id.org/zericatalog/material/not-specified> <http://www.w3.org/2000/01/rdf-schema#label> "(?)"@it .
<https://w3id.org/zericatalog/material/not-specified> <http://www.w3.org/2000/01/rdf-schema#label> "not specified"@en .
<https://w3id.org/zericatalog/material/not-specified> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.cidoc-crm.org/cidoc-crm/E57_Material> .