user: ### NOW ANSWER:
Question: Who is the guest 2 in the episode where guest 4 is Iyare Igiehon and guest 3 is John Oliver?
Columns: ['Date', 'Presenter', 'Guest 1', 'Guest 2', 'Guest 3', 'Guest 4']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2 September', 'Colin Murray', 'Eleanor Oldroyd', 'Bobby Gould', 'Bob Mills', 'Martin Kelner']
SQL:

assistant: SELECT "Guest 2" FROM "Table" WHERE "Guest 4" = 'Iyare Igiehon' AND "Guest 3" = 'John Oliver';