conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: To get to the library, Jill spends 12 minutes waiting for her first bus, 30 minutes riding on her first bus, and half the combined wait and trip time on her second bus. How many minutes does her second bus ride take?
conversations.from: assistant
conversations.value: First add the time spent waiting for the first bus to the time spent on it: 12 minutes + 30 minutes = 42 minutes
  Then divide that time by 2 to find the time she spends on the second bus: 42 minutes / 2 = 21 minutes