what is the {point in time} for {George R. R. Martin} has {award received} as {Nebula Award for Best Novelette} ?
George R. R. Martin received the Nebula Award for Best Novelette when?
When did George R. R. Martin receive the Nebula Award for Best Novelette?
SELECT ?k WHERE { ?x property:point_in_time ?k . ?x property:award_received resource:Nebula_Award_for_Best_Novelette . resource:George_R._R._Martin property:award_received ?x }
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/Q936683> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q181677 p:P166 ?s . ?s ps:P166 wd:Q936683 . ?s pq:P585 ?value}