Question: What inventions were made by the architect who designed Ragley Hall?
Answer(s):
answer: Universal joint
answer: Diaphragm
answer: Balance wheel

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:architecture.architect.structures_designed ns:m.0704b9 . 
?c ns:law.inventor.inventions ?x .
}