what is the {point in time} for {Louvre Museum} has {visitors per year} as {8.6e+06} ?
In which year did the Louvre Museum have 8.6 million visitors?
SELECT ?value WHERE { wd:Q19675 p:P1174 ?s . ?s ps:P1174 ?x filter(contains(?x,'8.6e+06')) . ?s pq:P585 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q19675> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1174> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <8.6e+06> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

IN 2017