what is the {point in time} for {Yale University} has {students count} as {6859.0} ?
In which year were there 6,859 students attending Yale University?
When did Yale University have a student count of 6,859?
SELECT ?h WHERE { ?m property:students_count ?s . resource:Yale_University property:students_count ?m . FILTER ( ?s = 6859.0 ) . ?m property:point_in_time ?h }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q49112> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2196> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <6859.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q49112 p:P2196 ?s . ?s ps:P2196 ?x filter(contains(?x , '6859.0')) . ?s pq:P585 ?value}