conversations.from: human
conversations.value: I would love to understand how to solve this problem: Antonio is a boy who eats a lot and his weight is 50 kilograms. Antonio's sister, who is an athlete, weighs 12 kilograms less than him. How much do the two siblings weigh together?
  Can you explain?
conversations.from: assistant
conversations.value: Antonio's weight is 50 kilograms. His sister weighs 12 kilograms less than him so she weighs 50 kilograms - 12 kilograms = 38 kilograms
  The weight of the two siblings combined is 50 kilograms + 38 kilograms = 88 kilograms.