user: Question: What is the lowest roll number of Katikati College?
Columns: ['Name', 'Years', 'Gender', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Fairhaven School', '1–6', 'Coed', 'Te Puke', 'State', 5.0, 389.0]
SQL:

assistant: SELECT MIN("Roll") FROM "Table" WHERE "Name" = 'Katikati College';