What is {population} of {Melilla} that is {point in time} is {2016-1-1} ?
How many people lived in Melilla as of 1/1/2016?
What was the population of Melilla in 2016-1-1?
SELECT ?n WHERE { ?n property:point_in_time ?k . resource:Melilla property:population ?n . ?n property:population ?n . FILTER ( CONTAINS ( YEAR ( ?k ) , '2016' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5831> .
?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> <2016-1-1>
} 

SELECT ?obj WHERE { wd:Q5831 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2016')) }