what is the {point in time} for {French Guiana} has {population} as {66977.0} ?
At what time French Guiana's population reach 66977?
When did French Guiana have a population of 66977?
SELECT ?h WHERE { ?f property:population ?g . resource:French_Guiana property:population ?f . ?f property:point_in_time ?h . FILTER ( CONTAINS ( ?g , '66977.0' ) ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q3769> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1082> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <66977.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q3769 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '66977.0')) . ?s pq:P585 ?value}