Question: What is the state capital where the major export is Apple trees?
Answer(s):
answer: Olympia

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:location.statistical_region.major_exports ?k .
?k ns:location.imports_exports_by_industry.industry ns:m.014j1m . 
?c ns:base.aareas.schema.administrative_area.capital ?x .
}