user: Question: How many joined Manchester University?
Columns: ['Institution', 'Location', 'Nickname', 'Founded', 'Type', 'Enrollment', 'Joined']
Types: ['text', 'text', 'text', 'real', 'text', 'real', 'text']
Sample row: ['Anderson University', 'Anderson, Indiana', 'Ravens', 1917.0, 'Private/Church of God', 3065.0, '1987']
SQL:

assistant: SELECT COUNT("Joined") FROM "Table" WHERE "Institution" = 'Manchester University';