Question: What book written by Tupac has the earliest date of publication?
Answer(s):
answer: The rose that grew from concrete

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07pzc)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07pzc ns:book.author.book_editions_published ?x .
?x ns:book.book_edition.publication_date ?num .
}
ORDER BY ?num LIMIT 1