Question: What book on evolution by Charles Darwin was published before 24 February 1871?
Answer(s):
answer: The Voyage of the Beagle

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01lwx)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01lwx ns:book.author.works_written ?x .
?x ns:common.topic.notable_types ns:m.01xryvm .
?x ns:book.written_work.subjects ns:m.02j8z .
?x ns:book.written_work.date_of_first_publication ?num .
FILTER (?num < "1871-02-24"^^xsd:dateTime) . 
}