What is {causes} of {wage}, that has {since} is {1830-8-28} ?
Since 1830-8-28, what has caused their wage?
SELECT ?answer WHERE { wd:Q6821213 wdt:P1542 ?answer . ?answer wdt:P580 ?x FILTER(contains(YEAR(?x),'1830'))}
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q6821213> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1542>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?answer. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P580> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <1830-8-28> . }
Since 1830-8-28, what has caused their wage?