Count the different affiliations of the authors of 'Comparison of reliability and the availability between four systems with warm standby components and standby switching failures'.
How many different affiliations do the authors of 'Comparison of reliability and the availability between four systems with warm standby components and standby switching failures' have?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/journals/amc/WangDK06> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/journals/amc/WangDK06>