Question: Where did President Clinton and Professor Charles Xavier graduated from?
Answer(s):
answer: University of Oxford

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0157m)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0157m ns:people.person.education ?y .
?y ns:education.education.institution ?x .
?x ns:common.topic.notable_types ns:m.01y2hnl .
?x ns:fictional_universe.school_in_fiction.students_graduates ns:m.025fh . 
}