What is {population} of {Bermuda} that is {point in time} is {1988-0-0} ?
What was the population of Bermuda in 1988?
What was the population of Bermuda on 0-0-1988?
SELECT ?a WHERE { ?i property:population ?a . FILTER ( CONTAINS ( YEAR ( ?i ) , '1988' ) ) . ?i property:point_in_time ?i . resource:Bermuda property:population ?i }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q23635> .
?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> <1988-0-0>
} 

SELECT ?obj WHERE { wd:Q23635 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1988')) }