Question: Under which president did Loretta Ucelli and Ann Lewis hold an office?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Loretta_Ucelli> <http://dbpedia.org/ontology/president> ?uri. <http://dbpedia.org/resource/Ann_Lewis> <http://dbpedia.org/ontology/president> ?uri . }