user: Question: What was the inroductory phase for the episode that originally aired January 21?
Columns: ['Episode #', 'The Wørd', 'Guest', 'Introductory phrase', 'Original Airdate', 'Production Code']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [332.0, '"(left blank)"', 'Andrew Sullivan , Richard Freeman', '"Hey. This is The Colber-t Repor-t."', 'January 7', 4001.0]
SQL:

assistant: SELECT "Introductory phrase" FROM "Table" WHERE "Original Airdate" = 'January 21';