conversations.from: human
conversations.value: Find a solution for this math problem: Alyana has a pizza that is cut into 16 slices. After she and her friends finish eating, there are 4 slices left. If each of them ate 2 slices of pizza, how many people ate the pizza?
conversations.from: assistant
conversations.value: 16 - 4 = 12 slices of pizza were eaten.
  So there were 12/2 = 6 people eating the pizza.