What is {date of death} and {mother} of {{Charlemagne} has {child} as {Charles the Younger}}
On what date did the mother of Charlemagne, grandmother of Charles the Younger die?
When did the mother of Charlemagne, grandmother of Charles the Younger die?
SELECT ?z ?f WHERE { resource:Charlemagne property:child ?f . ?f property:date_of_death ?z . ?f property:mother ?f . ?f property:child resource:Charles_the_Younger }
select distinct ?value1 ?value2 where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q3044> . ?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/Q283107>. ?statement <http://www.wikidata.org/entity/P580> ?value1 . ?statement <http://www.wikidata.org/entity/P2842> ?value2 } 
SELECT ?value1 ?value2 WHERE { wd:Q3044 p:P40 ?s . ?s ps:P40 wd:Q283107 . ?s pq:P570 ?value1 . ?s pq:P25 ?value2 }