Question: What country was previousl ruled by Chulalingkorn and features the Mekong river?
Answer(s):
answer: Thailand

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0j0g5)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0j0g5 ns:location.location.partially_containedby ?x .
?x ns:royalty.kingdom.rulers ns:m.01cqz5 . 
}