What is {Human Development Index} of {Bulgaria} that is {point in time} is {1980-0-0} ?
In 1980, what was the HDI for Bulgaria?
What is {Human Development Index} of {Bulgaria} that is {point in time} in {1980-0-0} ?
SELECT ?e WHERE { FILTER ( CONTAINS ( YEAR ( ?b ) , '1980' ) ) . ?b property:Human_Development_Index ?e . resource:Bulgaria property:Human_Development_Index ?b . ?b property:point_in_time ?b }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q219> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1081> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P585> <1980-0-0>
} 

SELECT ?obj WHERE { wd:Q219 p:P1081 ?s . ?s ps:P1081 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1980')) }