what is the {sourcing circumstances} for {Pietro Perugino} has {student of} as {Andrea del Verrocchio} ?
How did Andrea del Verrocchio come to be a student of Pietro Perugino?
SELECT ?value WHERE { wd:Q5827 p:P1066 ?s . ?s ps:P1066 wd:Q183458 . ?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/Q5827> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1066> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q183458> .
?statement <http://www.wikidata.org/entity/P1480> ?value. 
} 

How did Pietro Perugino come to teach Andrea del Verrocchio?