what is the {date of death} for {Isabella I of Castile} has {child} as {Maria of Aragon} ?
What's the date of death for the child of Isabella I of Castile?
When did Isabella I of Castile's child, Maria of Aragon, die?
SELECT ?q WHERE { ?w property:date_of_death ?q . resource:Isabella_I_of_Castile property:child ?w . ?w property:child resource:Maria_of_Aragon }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q45859> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P40> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q229816> .
?statement <http://www.wikidata.org/entity/P570> ?value. 
} 

SELECT ?value WHERE { wd:Q45859 p:P40 ?s . ?s ps:P40 wd:Q229816 . ?s pq:P570 ?value}