user: ### NOW ANSWER:
Question: What is the tie when team 2 is Koper?
Columns: ['Tie no', 'Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Borac Banja Luka', '2–1', 'Osijek', '2–0', '0–1']
SQL:

assistant: SELECT MIN("Tie no") FROM "Table" WHERE "Team 2" = 'Koper';