what is the {point in time} for {Keio University} has {students count} as {2492.0} ?
In what year did Keio University's enrollment reach 2492 students?
When did Keio University enroll 2492 students?
SELECT ?i WHERE { FILTER ( ?p = 2492.0 ) . resource:Keio_University property:students_count ?u . ?u property:students_count ?p . ?u property:point_in_time ?i }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q815432> .
?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> <2492.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q815432 p:P2196 ?s . ?s ps:P2196 ?x filter(contains(?x , '2492.0')) . ?s pq:P585 ?value}