Question: What is name of the company where Henry Ford worked that purchased Volvo Cars?
Answer(s):
answer: Ford Motor Company

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.03gxm)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.03gxm ns:people.person.employment_history ?y .
?y ns:business.employment_tenure.company ?x .
?x ns:organization.organization.companies_acquired ?c .
?c ns:business.acquisition.company_acquired ns:m.022hnr . 
}