human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Club, Home city, Stadium, Founded, Joined PRSL
###Question: when is the latest to join prsl when founded in 2007 and the stadium is roberto clemente stadium 1?
gpt
SELECT MAX Joined PRSL FROM table WHERE Founded = 2007 AND Stadium = roberto clemente stadium 1