Question: List the architect of the buildings whose one of the  architect is Philip Webb?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/architect> <http://dbpedia.org/resource/Philip_Webb> . ?x <http://dbpedia.org/property/architect> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Building>}