Deletion of Umberto Verdirosi

Comment: per |all of the above, for lack of  and because he has had ''zero'' exhibits in major Art worlds. He's had two  stories in the local Bergamo website, ''zero'' newspaper of record articles, and |only scattered references in art history books
Stance: delete
Cited policy: Wikipedia:Snowball clause (WP:SNOW||WP:RS||WP:SIGCOV)