Question: What is the affiliation of the hospital where Alfred Blalock works?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Alfred_Blalock> <http://dbpedia.org/property/workInstitutions> ?x . ?x <http://dbpedia.org/property/affiliation> ?uri  . }
Answer: The affiliations of the work institution of Alfred Blalock are [Johns Hopkins School of Medicine, Vanderbilt University].