Question: What is the alma mater of Alvin Bell and Charles Plosser?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Alvin_Bell> <http://dbpedia.org/ontology/college> ?uri. <http://dbpedia.org/resource/Charles_Plosser> <http://dbpedia.org/property/almaMater> ?uri}