Question: Which sucessor of George Madison is the sucessor of levi Lincoln, Sr. ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/George_Madison> <http://dbpedia.org/ontology/relation> ?uri. <http://dbpedia.org/resource/Levi_Lincoln,_Sr.> <http://dbpedia.org/property/successor> ?uri}