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