How many different affiliations do the authors of 'Habituation: A Possible Mitigation of a Wicked Problem' have?
Count the different affiliations of the authors of 'Habituation: A Possible Mitigation of a Wicked Problem'.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/ahfe/Richards20> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/conf/ahfe/Richards20>