Question: What is the name of the primary school that the author of Mathematical principles of natural philosophy attend?
Answer(s):
answer: The King's School, Grantham

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:book.author.book_editions_published ns:m.04v0x69 . 
?c ns:people.person.education ?y .
?y ns:education.education.institution ?x .
?x ns:education.educational_institution.school_type ns:m.014mjc .
}