user: Question: Name the guest 2 for Colin Murray 6 April
Columns: ['Date', 'Presenter', 'Guest 1', 'Guest 2', 'Guest 3', 'Guest 4']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['18 August', 'Colin Murray', 'John Rawling', 'Neil Delamere', 'Greg Brady', 'Clarke Carlisle (debut)']
SQL:

assistant: SELECT "Guest 2" FROM "Table" WHERE "Presenter" = 'Colin Murray' AND "Date" = '6 April';