user: Question: What is the aggregate for the tie with a team 2 of Irtysh?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sutjeska Nikšić', '2–3 †', 'MTZ-RIPO Minsk', '1–1', '1–2 ( aet )']
SQL:

assistant: SELECT "Agg." FROM "Table" WHERE "Team 2" = 'Irtysh';