conversations.from: human
conversations.value: John weighs one-quarter times more than what Mary weighs. Mary weighs 20 lbs less than Jamison's weight. If Mary weighs 160 lbs, what's the combined weight of the three?
  Solve it.
conversations.from: assistant
conversations.value: If Mary weighs 160 lbs, Jamison weighs 160 lbs + 20 lbs = 180 lbs.
  If John weighs one-quarter less than what Mary weighs, he weighs 1/4 * 160 lbs = 40 lbs more.
  The total weight of John is 160 lbs + 40 lbs = 200 lbs.
  The total weight for the three is 200 lbs + 180 lbs + 160 lbs = 540 lbs.