Question: Who wrote Arthur's Teacher Trouble, and also created Arthur?
Answer(s):
answer: Marc Brown

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0px0r)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0px0r ns:tv.tv_program.program_creator ?x .
?x ns:book.author.works_written ns:m.02vp0vc . 
}