what is the {sourcing circumstances} for {Jan van Eyck} has {date of birth} as {1390-0-0} ?
Where is the birth of Jan van Eyck in the year 1390 documented ?
SELECT ?value WHERE { wd:Q102272 p:P569 ?s . ?s ps:P569 ?x filter(contains(YEAR(?x),'1390')) . ?s pq:P1480 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q102272> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P569> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <1390-0-0> .
?statement <http://www.wikidata.org/entity/P1480> ?value. 
} 

Where is the introduction of Jan van Eyck in the year 1390 recorded ?