user: Question: When was the match that had Shaun Murphy as runner-up?
Columns: ['Date', 'Venue', 'Winner', 'Runner-up', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['21–22 June 2008', 'Fort Regent , St. Helier', 'John Higgins', 'Mark Selby', '6–3']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Runner-up" = 'Shaun Murphy';