What is {population} of {Namibia} that is {point in time} is {1986-0-0} ?
How many people lived in Namibia in 1986?
What was Namibia's population in 1986?
SELECT ?z WHERE { FILTER ( CONTAINS ( YEAR ( ?n ) , '1986' ) ) . ?t property:point_in_time ?n . ?t property:population ?z . resource:Namibia property:population ?t }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1030> .
?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> ?obj .
?statement <http://www.wikidata.org/entity/P585> <1986-0-0>
} 

SELECT ?obj WHERE { wd:Q1030 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1986')) }