How many different affiliations do the authors of 'Many Faces of Grid Computing' have?
Count the different affiliations of the authors of 'Many Faces of Grid Computing'.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/gcc/Rankich04> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/conf/gcc/Rankich04>