user: Question: What person was the runner-up skip when Julie Reddick was the winning skip?
Columns: ['Event', 'Date', 'Location', 'Winning skip', 'Runner-up skip']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['BDO Galt Curling Classic', 'Sept. 17-23', 'Cambridge, Ontario', 'Julie Reddick', 'Colleen Madonia']
SQL:

assistant: SELECT "Runner-up skip" FROM "Table" WHERE "Winning skip" = 'Julie Reddick';