conversations.from: human
conversations.value: I need help with this problem:
  At a birthday party, there are 20 red balloons and 15 green balloons. Before the party started, 3 red and 2 green balloons burst. How many balloons are left?
conversations.from: assistant
conversations.value: There are a total of 20 + 15 = 35 balloons at the party.
  Out of the 35, 3 + 2 = 5 balloons burst.
  Thus, only 35 - 5 = 30 balloons are left.