conversations.from: human
conversations.value: Find a solution for this math problem: Louise is hanging 30 of her pictures on the wall. She hangs some of them vertically, half of them horizontally, then hangs the remaining 5 pictures haphazardly. How many pictures did Louise hang vertically?
conversations.from: assistant
conversations.value: There are 30 / 2 = 15 pictures hanging horizontally.
  So there is a total of 15 + 5 = 20 pictures hanging either horizontally or haphazardly.
  Therefore, there are 30 – 20 = 10 pictures hanging vertically.