sub:assertion {
  sub:get-active-users-last-6m dct:description "This query returns the user IDs of all active users of the last 6 months." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get active users of last 6 months" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/full> ;
    <https://w3id.org/kpxl/grlc/sparql> """prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix dct: <http://purl.org/dc/terms/>
prefix np: <http://www.nanopub.org/nschema#>
prefix npa: <http://purl.org/nanopub/admin/>
prefix npx: <http://purl.org/nanopub/x/>
prefix prov: <http://www.w3.org/ns/prov#>

select distinct ?user where {
  { graph npa:graph {
    bind(now() - \"P6M\"^^xsd:duration as ?sixmonthsago)
    ?np dct:creator ?user .
    ?np dct:created ?date .
    filter(?date > ?sixmonthsago)
  } }
  union
  {
    graph npa:graph {
      bind(now() - \"P6M\"^^xsd:duration as ?sixmonthsago)
      ?np np:hasAssertion ?assertion .
      ?np np:hasProvenance ?prov .
      ?np dct:created ?date .
      filter(?date > ?sixmonthsago)
    }
    graph ?prov {
      ?assertion prov:wasAttributedTo ?user .
    }
  }
  filter not exists {
    graph npa:graph { ?np npa:hasSubIri ?user . }
  }
} order by ?user""" .
}