conversations.from: human
conversations.value: Please show me the solution for: Diego can carry 20 pounds of fruit home in his bookbag. If he buys a pound of watermelon, a pound of grapes, and a pound of oranges, how many pounds of apples can he buy?
conversations.from: assistant
conversations.value: He is able to carry 3 pounds of watermelon, grapes, and oranges because1+1+ 1 = 3
  He can buy 17 pounds of apple because20-3 = 17