user: Question: What is the Series for the UEFA Cup, in the 2006–07 season, and a Round of Group, and an opponent of AZ?
Columns: ['Season', 'Competition', 'Round', 'Opponent', 'Series']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2002–03', 'UEFA Cup', 'R1', 'Zenit St. Petersburg', '4–3']
SQL:

assistant: SELECT "Series" FROM "Table" WHERE "Competition" = 'UEFA Cup' AND "Season" = '2006–07' AND "Round" = 'Group' AND "Opponent" = 'AZ';