How many different affiliations do the authors of 'Regeln, Technik und Herrschaft' have?
Count the different affiliations of the authors of 'Regeln, Technik und Herrschaft'.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/gi/Blutner11> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/conf/gi/Blutner11>