what is the {point in time} for {Halo} has {developer} as {Creative Assembly} ?
What was the date when Halo was made by Creative Assembly?
When did Creative Assembly develop Halo?
SELECT ?k WHERE { resource:Halo property:developer ?q . ?q property:point_in_time ?k . ?q property:developer resource:Creative_Assembly }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1747150> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P178> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q611508> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q1747150 p:P178 ?s . ?s ps:P178 wd:Q611508 . ?s pq:P585 ?value}