SPARQL query for paper

course.sparql

PREFIX :<http://example.org/>
PREFIX foaf:<http://xmlns.com/foaf/0.1/>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX xsd:<http://www.w3.org/2001/XMLSchema#>
CONSTRUCT {
 ?Course :hasShape <Course>
} where {
    { SELECT ?Course {
      ?Course rdfs:label ?o .
    } GROUP BY ?Course HAVING (COUNT(*)=1)}
    { SELECT ?Course {
      ?Course rdfs:label ?o . FILTER ((isLiteral(?o) && datatype(?o) = xsd:string))
    } GROUP BY ?Course HAVING (COUNT(*)=1)}
    { SELECT ?Course (COUNT(*) AS ?Course_c0) {
      ?Course :student ?o .
    } GROUP BY ?Course}
    { SELECT ?Course (COUNT(*) AS ?Course_c1) {
      ?Course :student ?o . FILTER ((isIRI(?o) || isBlank(?o)))
    } GROUP BY ?Course}
    FILTER (?Course_c0 = ?Course_c1)
    { SELECT ?Course (COUNT(*) AS ?Course_c2) {
        { SELECT ?Course ?Person {
          ?Course :student ?Person . FILTER (true && (isIRI(?Person) || isBlank(?Person)))
        } }
        { SELECT ?Person WHERE {
            {
                { SELECT ?Person {
                  ?Person foaf:name ?o .
                } GROUP BY ?Person HAVING (COUNT(*)=1)}
                { SELECT ?Person {
                  ?Person foaf:name ?o . FILTER ((isLiteral(?o) && datatype(?o) = xsd:string))
                } GROUP BY ?Person HAVING (COUNT(*)=1)}
            } UNION {
                { SELECT ?Person (COUNT(*) AS ?Person_c0) {
                  ?Person foaf:givenName ?o .
                } GROUP BY ?Person}
                { SELECT ?Person (COUNT(*) AS ?Person_c1) {
                  ?Person foaf:givenName ?o . FILTER ((isLiteral(?o) && datatype(?o) = xsd:string))
                } GROUP BY ?Person}
                FILTER (?Person_c0 = ?Person_c1)
                { SELECT ?Person {
                  ?Person foaf:lastName ?o .
                } GROUP BY ?Person HAVING (COUNT(*)=1)}
                { SELECT ?Person {
                  ?Person foaf:lastName ?o . FILTER ((isLiteral(?o) && datatype(?o) = xsd:string))
                } GROUP BY ?Person HAVING (COUNT(*)=1)}
            }
        } GROUP BY ?Person HAVING (COUNT(*) = 1)}
    } GROUP BY ?Course }
    FILTER (?Course_c0 = ?Course_c2)
    OPTIONAL { ?Course :student ?Course_Person_ref0 . FILTER (true && (isIRI(?Course_Person_ref0) || isBlank(?Course_Person_ref0))) }
}