what is the {start time} for {Edward the Elder} has {position held} as {monarch} ?
When was Edward the Elder crowned king of England?
SELECT ?value WHERE { wd:Q187114 p:P39 ?s . ?s ps:P39 wd:Q116 . ?s pq:P580 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q187114> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q116> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

At what time was Edward the Elder crowned king of England?