Simplify the following text for a Grade 7 native English-speaking person.
Original: There are also other big and medium teams from SÃ # o Paulo , for example Portuguesa and Juventus , and many small teams .
Simplified: The major teams in SÃ # o Paulo are known as `` Trio of Iron '' : Corinthians , Palmeiras and SÃ # o Paulo FC . There are three other small clubs in the city , Portuguesa , Juventus and Nacional .