sub:assertion {
  sub:find-uri-references dct:description "This query returns nanopublications referencing the given URI in subject, predicate, or object position." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Find URI references" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/full> ;
    <https://w3id.org/kpxl/grlc/sparql> """prefix np: <http://www.nanopub.org/nschema#>
prefix npa: <http://purl.org/nanopub/admin/>
prefix npx: <http://purl.org/nanopub/x/>
prefix xsd: <http://www.w3.org/2001/XMLSchema#>
prefix dct: <http://purl.org/dc/terms/>

select ?np ?graphpred ?subj ?pred ?obj ?date (?__pubkey as ?pubkey) where {
  graph ?g {
    { { bind(?_ref_iri as ?subj) } union { bind(?_ref_iri as ?pred) } union { bind(?_ref_iri as ?obj) } }
    ?subj ?pred ?obj .
  }
  graph npa:graph {
    ?np npa:hasValidSignatureForPublicKey ?__pubkey .
    filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKey ?__pubkey . }
    ?np dct:created ?date .
    ?np ?__graphpred_iri ?g .
    bind(?__graphpred_iri as ?graphpred)
    values ?graphpred { np:hasAssertion np:hasProvenance np:hasPublicationInfo }
  }
} limit 1000""" .
}