How many different affiliations do the authors of 'Dynamic Assortment Optimization with Changing Contextual Information' have?
Count the different affiliations of the authors of 'Dynamic Assortment Optimization with Changing Contextual Information'.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/journals/jmlr/ChenWZ20> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/journals/jmlr/ChenWZ20>