What is {population} of {Isle of Man} that is {point in time} is {1978-0-0} ?
In 1978, how many people lived on Isle of Man?
What was the population of Isle of Man on 1978-0-0?
SELECT ?z WHERE { ?t property:population ?z . resource:Isle_of_Man property:population ?t . FILTER ( CONTAINS ( YEAR ( ?i ) , '1978' ) ) . ?t property:point_in_time ?i }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q9676> .
?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> <1978-0-0>
} 

SELECT ?obj WHERE { wd:Q9676 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1978')) }