what is the {point in time} for {Uber} has {total revenue} as {6.5e+09} ?
6.5e+09 was total revenue of Uber during what time?
When was Uber's total revenue equal to 6.5e+09?
SELECT ?t WHERE { ?l property:point_in_time ?t . ?l property:total_revenue ?b . FILTER ( CONTAINS ( ?b , '6.5e+09' ) ) . resource:Uber property:total_revenue ?l }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q780442> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2139> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <6.5e+09> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q780442 p:P2139 ?s . ?s ps:P2139 ?x filter(contains(?x , '6.5e+09')) . ?s pq:P585 ?value}