what is the {point in time} for {Joan Baez} has {award received} as {Thomas Merton Award} ?
On what year did Joan Baez receive the Thomas Merton Award
When did Joan Baez receive the Thomas Merton Award?
SELECT ?h WHERE { resource:Joan_Baez property:award_received ?h . ?h property:point_in_time ?h . ?h property:award_received resource:Thomas_Merton_Award }
select distinct ?value  where {
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?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/Q337620> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q131725 p:P166 ?s . ?s ps:P166 wd:Q337620 . ?s pq:P585 ?value}