CREATE TABLE table_name_30 (capacity NUMBER, club VARCHAR2)

What was the largest capacity when the club was F.C. Igea Virtus Barcellona?
SELECT MAX(capacity) FROM table_name_30 WHERE club = "f.c. igea virtus barcellona"
SELECT MAX("capacity") FROM "table_name_30" WHERE "club" = "f.c. igea virtus barcellona"