sub:assertion {
  sub:get-research-questions-for-systematic-review dct:description "This query returns all research questions that are linked to the given systematic review." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get research questions for systematic review" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/type/a4c5273498f0adfe31b6906e2637e8523d0fbcee4dccaff818f3b71d5218987c> ;
    <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 sl: <https://w3id.org/sciencelive/o/terms/>

select ?research_question ?research_question_label (?np as ?source) where {
  graph npa:graph {
    ?np npa:hasValidSignatureForPublicKeyHash ?pubkey .
    filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKeyHash ?pubkey . }
    ?np dct:created ?date .
    ?np npx:signedBy ?creator .
    ?np np:hasAssertion ?a .
    optional { ?np rdfs:label ?label }
  }
  values ?_systematicReview_multi_iri {}
  graph ?a {
    ?_systematicReview_multi_iri sl:targetsResearchQuestion ?research_question .
  }
  service <https://w3id.org/np/l/nanopub-query-1.1/repo/type/e7590fad93a7eff7bc7dd8570a694d400662afc24a65294b64dcf614c5d39d94> {
    select ?research_question ?research_question_label {
    graph npa:graph {
      ?rqnp npx:introduces ?research_question .
      ?rqnp npa:hasValidSignatureForPublicKeyHash ?rqpubkey .
      filter not exists { ?rqnpx npx:invalidates ?rqnp ; npa:hasValidSignatureForPublicKeyHash ?rqpubkey . }
      ?rqnp np:hasAssertion ?rqa .
    }
    graph ?rqa {
      ?research_question rdfs:label ?research_question_label .
    }
  }
  }
}""" .
}