What is {country of citizenship} of {Douglas Mawson} that is {end cause} is {Royal and Parliamentary Titles Act 1927} ?
What nationality was Douglas Mawson at the time of the Royal and Parliamentary Titles Act in 1927?
SELECT ?obj WHERE { wd:Q434281 p:P27 ?s . ?s ps:P27 ?obj . ?s pq:P1534 wd:Q7375047 }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q434281> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P27> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1534> <http://wikidata.dbpedia.org/resource/Q7375047>
} 

Which was the nationality of Douglas Mawson at the time of the Royal and Parliamentary Titles Act in 1927?