Question: What is the first episode of the fifth season and the 81st overall episode of the American animated television sitcom "SpongeBob SquarePants" where Sirena Irwin voiced Mama Krabs?
{'answer': 'Friend or Foe', 'supporting_facts': [['Sirena Irwin', 1], ['Friend or Foe (SpongeBob SquarePants)', 0]]}