Question: Who studied at  Harvard-Westlake School and has Henry E. Catto, Jr. as   predecessor ?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri onto:almaMater <http://dbpedia.org/resource/Harvard-Westlake_School> . ?uri onto:predecessor <http://dbpedia.org/resource/Henry_E._Catto,_Jr.>  . }