What is the {book} for {illustrator} of {William Blake}
What books were outlined by William Blake?
What books were illustrated by William Blake?
SELECT DISTINCT ?x WHERE { ?x rdf:type ontology:book . ?x property:illustrator resource:William_Blake }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P110> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q41513> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q571> } 
 select distinct ?sbj where { ?sbj wdt:P110 wd:Q41513 . ?sbj wdt:P31 wd:Q571 } 