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Blazegraph(TM) RDF Test Suites

There is a newer version: 2.1.4

PREFIX rdf:  
PREFIX rdfs: 
PREFIX foaf: 

SELECT ?x ?o
WHERE {
  ?x rdfs:label ?o .
  { 
     SELECT ?x { 
     
     	?x rdf:type foaf:Person .
     
	    # Lift out the sub-select as a named subquery which runs exactly once.
    	hint:SubQuery hint:runOnce "true" .
     }
  }
}