What is {chief executive officer} of {Sony} that is {start time} is {2012-4-1} ?
Who is the CEO of Sony beginning April 1, 2012?
Who is the chief executive officer of Sony starting April 1, 2012?
SELECT ?f WHERE { resource:Sony property:chief_executive_officer ?z . ?z property:chief_executive_officer ?f . FILTER ( CONTAINS ( YEAR ( ?s ) , '2012' ) ) . ?z property:start_time ?s }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q41187> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P169> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <2012-4-1>
} 

SELECT ?obj WHERE { wd:Q41187 p:P169 ?s . ?s ps:P169 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2012')) }