Question: Which job of Irving Chernev is the non-fiction subject of the Thud ?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Irving_Chernev> onto:occupation ?uri. <http://dbpedia.org/resource/Thud!> onto:nonFictionSubject ?uri}