what is the {point in time} for {Gary Becker} has {award received} as {National Medal of Science} ?
When was Gary Becker given the National Medal of Science?
When did Gary Becker receive the National Medal of Science?
SELECT ?d WHERE { resource:Gary_Becker property:award_received ?p . ?p property:point_in_time ?d . ?p property:award_received resource:National_Medal_of_Science }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q191020> .
?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/Q737051> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q191020 p:P166 ?s . ?s ps:P166 wd:Q737051 . ?s pq:P585 ?value}