Question: Formulate an answer to this elaborate question: Kim Ok-bin (born December 29, 1986) is a South Korean actress, Kim made her debut in an online beauty contest in 2004, and began her acting career with a role in 2005 film "Voice", Voice is a 2005 South Korean horror film, and which number installment of the "Whispering Corridors" film series?
Answer:
fourth