what is the {point in time} for {South America} has {number of out of school children} as {7.07274e+06} ?
When did South America have over 7000000 students out of school
When did South America have 7.07274e+06 students out of school?
SELECT ?v WHERE { ?i property:point_in_time ?v . ?i property:number_of_out-of-school_children ?b . FILTER ( CONTAINS ( ?b , '7.07274e+06' ) ) . resource:South_America property:number_of_out-of-school_children ?i }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q18> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2573> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <7.07274e+06> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q18 p:P2573 ?s . ?s ps:P2573 ?x filter(contains(?x , '7.07274e+06')) . ?s pq:P585 ?value}