conversations.from: human
conversations.value: A company spends $15000 on advertising for a year, and then spends a third of that amount on advertising for another year.  What's the total amount the company spent on advertising for the two years?
  How to solve this?
conversations.from: assistant
conversations.value: 15000/3 = 5,000 is spent on advertisement in the second year.
  The total on advertisement for the two years is 15000+5000 = 20000 dollars.