what is the {point in time} for {Rachel Carson} has {award received} as {Presidential Medal of Freedom} ?
When was the Presidential Medal of Freedom given to Rachel Carson?
When did Rachel Carson receive the Presidential Medal of Freedom?
SELECT ?m WHERE { ?e property:point_in_time ?m . resource:Rachel_Carson property:award_received ?e . ?e property:award_received resource:Presidential_Medal_of_Freedom }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q100948> .
?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/Q17144> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q100948 p:P166 ?s . ?s ps:P166 wd:Q17144 . ?s pq:P585 ?value}