Count the different affiliations of the authors of 'Understanding the Impact of Customer Reviews on Hotel Rating: An Empirical Research'.
How many different affiliations do the authors of 'Understanding the Impact of Customer Reviews on Hotel Rating: An Empirical Research' have?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/journals/corr/abs-2002-05342> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/journals/corr/abs-2002-05342>