Count the different affiliations of the authors of 'A New Point Access Method Based on Wavelet Trees'.
How many different affiliations do the authors of 'A New Point Access Method Based on Wavelet Trees' have?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/er/BrisaboaLNS09> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/conf/er/BrisaboaLNS09>