what is the {point in time} for {Lorin Maazel} has {award received} as {Grammy Award for Best Opera Recording} ?
when did lorin Maazel receive a grammy award?
When did Lorin Maazel received the Grammy Award for Best Opera Recording?
SELECT ?p WHERE { ?x property:award_received resource:Grammy_Award_for_Best_Opera_Recording . ?x property:point_in_time ?p . resource:Lorin_Maazel property:award_received ?x }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q117710> .
?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/Q5593843> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q117710 p:P166 ?s . ?s ps:P166 wd:Q5593843 . ?s pq:P585 ?value}