user: Question: Tell me the years competed for Panthers
Columns: ['Club', 'Nickname', 'Years competed', 'Home Ground', 'Premierships']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Churchill', 'Kangaroos', '1984-1994', 'Gaskin Park, Churchill', '(0)']
SQL:

assistant: SELECT "Years competed" FROM "Table" WHERE "Nickname" = 'Panthers';