What is the {written work} for {foundational text} of {Esperanto}
What composed work is the foundational content of Esperanto?
What written work is the foundational text of Esperanto?
SELECT DISTINCT ?f WHERE { ?f rdf:type ontology:written_work . resource:Esperanto property:foundational_text ?f }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q143> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P457> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q47461344> } 
 select distinct ?obj where { wd:Q143 wdt:P457 ?obj . ?obj wdt:P31 wd:Q47461344 } 
Unua Libro