query

PREFIX crm: <http://www.cidoc-crm.org/cidoc-crm/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX crmdig: <http://www.ics.forth.gr/isl/CRMdig/>
PREFIX custom: <https://artresearch.net/custom/>
CONSTRUCT {  
    ?s custom:has_image ?image.
    ?s rdfs:label ?label.
    ?s <https://artresearch.net/resource/fr/Work_kept_by_Institution> ?institution.
    ?institution rdfs:label ?institution_label.
    ?s <https://artresearch.net/resource/fr/Work_created_from_Artist> ?artist.
    ?artist rdfs:label ?artist_label.
    ?s <https://artresearch.net/custom/has_provider> ?provider.
    ?provider rdfs:label ?provider_label.
    ?s <https://artresearch.net/resource/fr/Work_influenced_by_Artist> ?influence.
    ?influence rdfs:label ?influence_label.
} WHERE {
  {
    ?s <https://artresearch.net/custom/has_provider> <https://artresearch.net/resource/zeri/source/Zeri>.
    ?s <https://artresearch.net/resource/fr/Work_depicted_by_Photo> ?photo.
    ?photo <http://www.cidoc-crm.org/cidoc-crm/P129i_is_subject_of>  ?image.
    ?image <http://www.cidoc-crm.org/cidoc-crm/P2_has_type> <https://artresearch.net/resource/zeri/type/4F6A2899-2950-328C-B172-54AD813EE993>.
  } UNION {
    ?s <https://artresearch.net/custom/has_provider> <https://artresearch.net/resource/itatti/source/ITatti>.
    ?s <https://artresearch.net/resource/fr/Work_depicted_by_Photo> ?photo.
    ?photo <http://www.cidoc-crm.org/cidoc-crm/P129i_is_subject_of>  ?image.
    ?image <http://www.cidoc-crm.org/cidoc-crm/P2_has_type> <https://artresearch.net/resource/itatti/type/4F6A2899-2950-328C-B172-54AD813EE993>.
  }
  ?s rdfs:label ?label.
  OPTIONAL {
    ?s <https://artresearch.net/resource/fr/Work_kept_by_Institution> ?institution.
    ?institution rdfs:label ?institution_label.
  }
  OPTIONAL {
    ?s <https://artresearch.net/resource/fr/Work_created_from_Artist> ?artist.
    ?artist rdfs:label ?artist_label.
  }
  OPTIONAL {
    ?s <https://artresearch.net/custom/has_provider> ?provider.
    ?provider rdfs:label ?provider_label.
  }
  OPTIONAL {
    ?s <https://artresearch.net/resource/fr/Work_influenced_by_Artist> ?influence.
    ?influence rdfs:label ?influence_label.
  }
} LIMIT 100