user: Question: Who were the Investing Dragons in the episode that first aired on 18 January 2005 with the entrepreneur Tracey Herrtage?
Columns: ['Episode', 'First aired', 'Entrepreneur(s)', 'Company or product name', 'Money requested (£)', 'Investing Dragon(s)']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Episode 1', '4 January 2005', 'Charles Ejogo', 'Umbrolly', 150000.0, 'Duncan Bannatyne & Peter Jones']
SQL:

assistant: SELECT "Investing Dragon(s)" FROM "Table" WHERE "First aired" = '18 January 2005' AND "Entrepreneur(s)" = 'Tracey Herrtage';