Question: Which 2013 Virginia senator wrote "Fields of Fire"?
Answer(s):
answer: Jim Webb

SPARQL query:
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SELECT DISTINCT ?x
WHERE {
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FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07z1m ns:government.political_district.representatives ?y .
?y ns:government.government_position_held.office_holder ?x .
?y ns:government.government_position_held.governmental_body ns:m.07t58 .
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FILTER(xsd:datetime(?sk1) <= "2013-12-31"^^xsd:dateTime) })
FILTER(NOT EXISTS {?y ns:government.government_position_held.to ?sk2} || 
EXISTS {?y ns:government.government_position_held.to ?sk3 . 
FILTER(xsd:datetime(?sk3) >= "2013-01-01"^^xsd:dateTime) })
?x ns:book.author.works_written ns:m.043r5_3 . 
}