Count the different affiliations of the authors of 'Preliminary Steps in Designing and Implementing a Privilege Verifier for PMI'.
How many different affiliations do the authors of 'Preliminary Steps in Designing and Implementing a Privilege Verifier for PMI' have?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/iadis/BerbecaruL04> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/conf/iadis/BerbecaruL04>