@prefix ex: <https://sparql.uniprot.org/.well-known/sparql-examples/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <https://schema.org/> .
@prefix sh: <http://www.w3.org/ns/shacl#> .

ex:213_protein_isolated_from_tissue a sh:SPARQLExecutable,
        sh:SPARQLSelectExecutable ;
    rdfs:comment "Find the tissue a protein was originally found to be expressed in from (up:isolatedFrom), distinct from its usual organism/subcellular-location annotations — the object is either a shared Tissue resource or a locally-defined (entry specific) tissue label"@en ;
    sh:prefixes _:sparql_examples_prefixes ;
    sh:select """PREFIX up: <http://purl.uniprot.org/core/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>

SELECT
  ?protein
  ?tissue
  ?tissueLabel
WHERE {
  ?protein a up:Protein ;
    up:isolatedFrom ?tissue .
  ?tissue a up:Tissue .
  # A shared tissue resource carries a skos:prefLabel; a protein-local
  # tissue fragment (minted when no shared resource exists) carries an
  # rdfs:label instead.
  OPTIONAL { ?tissue skos:prefLabel ?tissueLabel }
  OPTIONAL { ?tissue rdfs:label ?tissueLabel }
}""" ;
    schema:keywords "tissue" , "isolation" , "protein source" ;
    schema:target <https://sparql.uniprot.org/sparql/> .