What is {date of birth} and {date of death} of {{Pedro I} has {child} as {Maria II of Portugal}}
What is the birth and death date of Pedro I, whose daughter is Portugal's Maria II?
What is the date of birth and death of Pedro I, whose daughter Maria II is from Portugal?
SELECT ?u ?f WHERE { ?k property:date_of_birth ?u . ?k property:date_of_death ?f . ?k property:child resource:Maria_II_of_Portugal . resource:Pedro_I_of_Brazil property:child ?k }
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/Q221145>. ?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:Q221145 . ?s pq:P569 ?value1 . ?s pq:P570 ?value2 }