conversations.from: human
conversations.value: Kim has 12 nail polishes. Heidi has 5 more nail polishes than Kim, and Karen has 4 fewer nail polishes than Kim. How many nail polishes does Karen and Heidi have together?
conversations.from: assistant
conversations.value: Heidi has 12+5 = 17 nail polishes.
  Karen has 12-4 = 8 nail polishes.
  Heidi and Karen have 17+8 = 25 nail polishes together.