What is {number of out of school children} of {North America} that is {point in time} is {2008-1-1} ?
How many children out of school in North America in 2008-1-1?
What is the number of out of school children of North America at 2008-1-1?
SELECT ?p WHERE { ?n property:number_of_out-of-school_children ?p . resource:North_America property:number_of_out-of-school_children ?n . ?n property:point_in_time ?l . FILTER ( CONTAINS ( YEAR ( ?l ) , '2008' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q49> .
?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> ?obj .
?statement <http://www.wikidata.org/entity/P585> <2008-1-1>
} 

SELECT ?obj WHERE { wd:Q49 p:P2573 ?s . ?s ps:P2573 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2008')) }