user: ### NOW ANSWER:
Question: Which Joined has a Nickname of knights, and an Enrollment larger than 2960?
Columns: ['Institution', 'Location', 'Nickname', 'Founded', 'Enrollment', 'Joined']
Types: ['text', 'text', 'text', 'real', 'real', 'real']
Sample row: ['Abraham Baldwin Agricultural College', 'Tifton', 'Stallions', 1908.0, 3284.0, 2010.0]
SQL:

assistant: SELECT SUM("Joined") FROM "Table" WHERE "Nickname" = 'knights' AND "Enrollment" > 2960.0;