What is {position held} of {Idi Amin} that is {start time} is {1975-7-28} ?
Which position was did Idi Amin hold starting on July 28, 1975?
What position did Idi Amin hold starting on July 28, 1975?
SELECT ?m WHERE { FILTER ( CONTAINS ( YEAR ( ?k ) , '1975' ) ) . ?f property:position_held ?m . resource:Idi_Amin property:position_held ?f . ?f property:start_time ?k }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q48231> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1975-7-28>
} 

SELECT ?obj WHERE { wd:Q48231 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1975')) }