Question: With whom is the institution of David Charles affiliated?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/David_Charles_(physician)> <http://dbpedia.org/property/workInstitutions> ?x . ?x <http://dbpedia.org/property/affiliation> ?uri  . }
Answer: [Vanderbilt University] is the affiliation of the working institution of David Charles.