What is {population} of {Mali} that is {point in time} is {1973-0-0} ?
Give me the population of Mali in 1973?
What was Mali's population in 1973?
SELECT ?e WHERE { ?p property:point_in_time ?f . FILTER ( CONTAINS ( YEAR ( ?f ) , '1973' ) ) . resource:Mali property:population ?p . ?p property:population ?e }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q912> .
?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> <1973-0-0>
} 

SELECT ?obj WHERE { wd:Q912 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1973')) }