Question: What were the religions of the opposing sides in the Battle of Kulikovo?
Answer(s):
answer: Russian Orthodox Church
answer: Islam

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_combatant.casualties ?k .
?k ns:military.casualties.military_conflict ns:m.01975w . 
?c ns:location.statistical_region.religions ?y .
?y ns:location.religion_percentage.religion ?x .
}