SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Thud!> <http://dbpedia.org/ontology/nonFictionSubject> ?uri. <http://dbpedia.org/resource/Jon_Speelman> <http://dbpedia.org/ontology/field> ?uri}
Which non fiction of the Thud is also the field of the Jon Speelman?
SELECT DISTINCT ?w WHERE { resource:Jon_Speelman property:field ?w . resource:Thud! property:non_fiction_subject ?w }
Chess
[Chess] is the non-fiction subject of Thud and the field of Jon Speelman.
[Chess] is the non-fiction book by Thud and the field by Jon Speelman.
The non-fiction subject of the Thud! and field of the the person is [Chess].
Non-fiction book Thud! and the field of people [Chess].