Question: Where did the person that served in the military unit 21st Illinois Volunteer Infantry Regiment go to school?
Answer(s):
answer: United States Military Academy

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:military.military_person.service ?k .
?k ns:military.military_service.unit ns:m.02rzchs . 
?c ns:people.person.education ?y .
?y ns:education.education.institution ?x .
}