what is the {point in time} for {Allan Nevins} has {award received} as {Bancroft Prize} ?
When did Allan Nevins got the Bancroft Prize ?
At what time has Allan Nevins received the Bancroft Prize ?
SELECT ?r WHERE { resource:Allan_Nevins property:award_received ?z . ?z property:point_in_time ?r . ?z property:award_received resource:Bancroft_Prize }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q3380712> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P166> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q724144> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q3380712 p:P166 ?s . ?s ps:P166 wd:Q724144 . ?s pq:P585 ?value}