what is the {instance of} for {Ghent Altarpiece} has {inception} as {1432-1-1} ?
What did Ghent Altarpiece invent in 1432?
What did Ghent Altarpiece create in 1432?
SELECT ?v WHERE { ?d rdf:type ?v . resource:Ghent_Altarpiece property:inception ?d . FILTER ( CONTAINS ( YEAR ( ?j ) , '1432' ) ) . ?d property:inception ?j }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q734834> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P571> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <1432-1-1> .
?statement <http://www.wikidata.org/entity/P31> ?value. 
} 

SELECT ?value WHERE { wd:Q734834 p:P571 ?s . ?s ps:P571 ?x filter(contains(YEAR(?x),'1432')) . ?s pq:P31 ?value}