Question: who hosted the 5th dead or alive tournament
Answer: Helena dissolved DOATEC 's Biotechnology Division , stopped the Military Division 's biological weapons projects Alpha , Epsilon and Omega , fired all members of Donovan 's faction , and announced that she intends to hold the Dead or Alive Tournament 5 ( DOA5 ) , hosted by Zack , `` to show the world the principles and philosophies upholding the new DOATEC .