what is the {start time} for {All Nippon Airways} has {item operated} as {Boeing 767} ?
From what day did the Boeing 767 start being used by All Nippon Airways?
When did All Nippon Airways start using Boeing 767?
SELECT ?q WHERE { resource:All_Nippon_Airways_(ANA) property:item_operated ?r . ?r property:item_operated resource:Boeing_767 . ?r property:start_time ?q }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q204284> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P121> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q6423> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q204284 p:P121 ?s . ?s ps:P121 wd:Q6423 . ?s pq:P580 ?value}