what is the {end time} for {Charles Hermite} has {educated at} as {École Polytechnique} ?
During what time was Charles Hermite educated at Ecole Polytechnique?
When was Charles Hermite educated at Ecole Polytechnique?
SELECT ?l WHERE { resource:Charles_Hermite property:educated_at ?w . ?w property:educated_at resource:École_polytechnique . ?w property:end_time ?l }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q168401> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P69> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q273626> .
?statement <http://www.wikidata.org/entity/P582> ?value. 
} 

SELECT ?value WHERE { wd:Q168401 p:P69 ?s . ?s ps:P69 wd:Q273626 . ?s pq:P582 ?value}