conversations.from: human
conversations.value: The cafe has 16 chefs and 16 waiters. If 6 chefs and 3 waiters drop out, how many chefs and waiters are left?
  How to solve this?
conversations.from: assistant
conversations.value: There are 16 chefs - 6 chefs = 10 chefs left.
  There are 16 waiters - 3 waiters = 13 waiters left.
  In total there are 10 chefs + 13 waiters = 23 chefs and waiters left.