user: Question: What is the Round when the series shows 5th place, and a Season of 2006–07?
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 "Round" FROM "Table" WHERE "Series" = '5th place' AND "Season" = '2006–07';