what is the {point in time} for {Pearl S. Buck} has {award received} as {National Women's Hall of Fame} ?
What year did  Pearl S. Buck receive the National Women's Hall of Fame award?
When did Pearl S. Buck receive an award in the National Women's Hall of Fame?
SELECT ?f WHERE { ?m property:award_received resource:National_Women's_Hall_of_Fame . resource:Pearl_S._Buck property:award_received ?m . ?m property:point_in_time ?f }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q80900> .
?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/Q1967852> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q80900 p:P166 ?s . ?s ps:P166 wd:Q1967852 . ?s pq:P585 ?value}