what is the {start time} for {Golden Horde} has {instance of} as {khanate} ?
on what date Golden Horde start in khanate
When did Golden Horde start in khanate?
SELECT ?t WHERE { ?r rdf:type ontology:Khanate . ?r property:start_time ?t . resource:Golden_Horde rdf:type ?r }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q79965> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P31> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q331644> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q79965 p:P31 ?s . ?s ps:P31 wd:Q331644 . ?s pq:P580 ?value}