What is {population} of {Sierra Leone} that is {point in time} is {1982-0-0} ?
In the year 1982 Sierra Leone had a population of how many?
What was the population of Sierra Leone in the year 1982?
SELECT ?h WHERE { ?l property:point_in_time ?f . resource:Sierra_Leone property:population ?l . ?l property:population ?h . FILTER ( CONTAINS ( YEAR ( ?f ) , '1982' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1044> .
?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> <1982-0-0>
} 

SELECT ?obj WHERE { wd:Q1044 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1982')) }