CREATE TABLE table_name_31 (joined_prsl INT, founded VARCHAR, stadium VARCHAR)

when is the latest to join prsl when founded in 2007 and the stadium is roberto clemente stadium 1?
SELECT MAX(joined_prsl) FROM table_name_31 WHERE founded = 2007 AND stadium = "roberto clemente stadium 1"
SELECT MAX("joined_prsl") FROM "table_name_31" WHERE "founded" = 2007 AND "roberto clemente stadium 1" = "stadium"