SPARQL Subscription Queries

queries.py

createQuery="""
PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl:<http://www.w3.org/2002/07/owl#>
PREFIX xsd:<http://www.w3.org/2001/XMLSchema#>
PREFIX locateme:<http://www.semanticweb.org/CalcolatoriM/LocateMeOntology.owl#>
SELECT ?label ?user
WHERE {
    locateme:MainCommandInterface locateme:HasCommand ?command .
    ?command locateme:HasCommandType locateme:Create .
    ?command rdf:label ?label .
    ?command locateme:HasIssuer ?user
}
"""

joinQuery="""
PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl:<http://www.w3.org/2002/07/owl#>
PREFIX xsd:<http://www.w3.org/2001/XMLSchema#>
PREFIX locateme:<http://www.semanticweb.org/CalcolatoriM/LocateMeOntology.owl#>
SELECT ?group ?user
WHERE {
    locateme:MainCommandInterface locateme:HasCommand ?command .
    ?command locateme:HasCommandType locateme:Join .
    command locateme:HasGroup ?group .
    ?command locateme:HasIssuer ?user
}
"""

leaveQuery="""
PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl:<http://www.w3.org/2002/07/owl#>
PREFIX xsd:<http://www.w3.org/2001/XMLSchema#>
PREFIX locateme:<http://www.semanticweb.org/CalcolatoriM/LocateMeOntology.owl#>
SELECT ?group ?user
WHERE {
    locateme:MainCommandInterface locateme:HasCommand ?command .
    ?command locateme:HasCommandType locateme:Leave .
    command locateme:HasGroup ?group .
    ?command locateme:HasIssuer ?user
}
"""