What is {date of death} and {date of birth} of {{Pedro I} has {child} as {Pedro II of Brazil}}
Whey did Pedro I pass on, and when was his child Pedro II of Brazil born?
Whey did Pedro I die, and when was his son Pedro II of Brazil born?
SELECT ?y ?n WHERE { ?t property:child resource:Pedro_II_of_Brazil . resource:Pedro_I_of_Brazil property:child ?t . ?t property:date_of_birth ?n . ?t property:date_of_death ?y }
select distinct ?value1 ?value2 where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q939> . ?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/Q156774>. ?statement <http://www.wikidata.org/entity/P580> ?value1 . ?statement <http://www.wikidata.org/entity/P2842> ?value2 } 
SELECT ?value1 ?value2 WHERE { wd:Q939 p:P40 ?s . ?s ps:P40 wd:Q156774 . ?s pq:P570 ?value1 . ?s pq:P569 ?value2 }