Question: Where were the doctoral students of James Langer born?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/James_S._Langer> <http://dbpedia.org/ontology/doctoralStudent> ?x . ?x <http://dbpedia.org/property/placeOfBirth> ?uri  . }
Answer: The place of birth of the doctoral student of James S. Langer is [Moscow, Russia].