What is {spouse} of {Fred Hollows} that is {start time} is {1980-1-1} ?
Who became Fred Hollows' spouse on 1980-1-1?
Who did Fred Hollows marry on 1980-1-1?
SELECT ?v WHERE { ?k property:spouse ?v . resource:Fred_Hollows property:spouse ?k . FILTER ( CONTAINS ( YEAR ( ?g ) , '1980' ) ) . ?k property:start_time ?g }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q3086860> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1980-1-1>
} 

SELECT ?obj WHERE { wd:Q3086860 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1980')) }