sub:assertion {
  sub:get-posts-by-user dct:description "This query returns the posts by the given user." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get posts by given user" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/type/89ce048c79daecabd00d1a8223b30d424867c813816752a4c802e619dee6a600> ;
    <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 schema: <https://schema.org/>

select ?title ?about ?text ?date ?url ?np (\"^\" as ?np_label) where {
  graph npa:graph {
    ?np npx:hasNanopubType schema:SocialMediaPosting .
    ?np npa:hasValidSignatureForPublicKeyHash ?pubkey .
    filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKeyHash ?pubkey . }
    ?np npx:introduces ?post .
    ?np np:hasAssertion ?a .
  }
  graph ?a {
    ?post schema:headline ?title .
    ?post schema:articleBody ?text .
    ?post schema:datePublished ?date .
    ?post schema:author ?_author_iri .
    optional { ?post schema:url ?url . }
    optional { ?post rdfs:seeAlso ?about . }
  }
}
order by desc(?date)""" .
}