what is the {point in time} for {Grateful Dead} has {award received} as {Grammy Lifetime Achievement Award} ?
When did the Grateful Dead get the Grammy for Lifetime Achievement Award?
When did the Grateful Dead receive the Grammy for Lifetime Achievement Award?
SELECT ?d WHERE { resource:Grateful_Dead property:award_received ?c . ?c property:award_received resource:Grammy_Lifetime_Achievement_Award . ?c property:point_in_time ?d }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q212533> .
?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/Q935843> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q212533 p:P166 ?s . ?s ps:P166 wd:Q935843 . ?s pq:P585 ?value}