What is {subsidiary} of {Cisco Systems} that is {start time} is {2010-0-0} ?
Who started being a subsidiary of Cisco Systems in 2010?
SELECT ?obj WHERE { wd:Q173395 p:P355 ?s . ?s ps:P355 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2010')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q173395> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P355> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <2010-0-0>
} 

Who established a subsidiary of Cisco Systems in 2010?