Question: Name a office holder whose predecessor is Edward Douglass White and has son named Charles Phelps Taft II?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/predecessor> <http://dbpedia.org/resource/Edward_Douglass_White> . ?uri <http://dbpedia.org/ontology/child> <http://dbpedia.org/resource/Charles_Phelps_Taft_II>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/OfficeHolder>}