What is {owned by} of {4chan} that is {start time} is {2015-9-21} ?
In 2015, who purchased 4chan?
Who bought 4chan in 2015?
SELECT ?g WHERE { ?r property:start_time ?p . FILTER ( CONTAINS ( YEAR ( ?p ) , '2015' ) ) . ?r property:owned_by ?g . resource:4chan property:owned_by ?r }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q238330> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P127> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <2015-9-21>
} 

SELECT ?obj WHERE { wd:Q238330 p:P127 ?s . ?s ps:P127 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2015')) }