answer: Mary is cooking while John tells her that the Capital Building caught on a big fire. Mary forgets the food cooking on the fire.
documents: #Person1#: What are you doing, Mary?
  #Person2#: I am cooking the dinner, John.
  #Person1#: Oh. Look! The Capital Building caught on a big fire today.
  #Person2#: What? How about the people in the building?
  #Person1#: More than 220 people were killed and the building was destroyed.
  #Person2#: It must have taken the fire fighters a long time to put it out.
  #Person1#: Yes, they spent about five hours putting it out. Hm, what a strange smell!
  #Person2#: Oh, I forgot the food cooking on the fire!
  #Person1#: Be quick! Turn the gas off. You should be careful next rime, otherwise you'd have our house on fire!