Question: What is the common profession of DeWitt Clinton and Claiborne Pell ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/DeWitt_Clinton> <http://dbpedia.org/property/office> ?uri. <http://dbpedia.org/resource/Claiborne_Pell> <http://dbpedia.org/ontology/profession> ?uri}