conversations.from: human
conversations.value: This math problem has got me stumped: Miriam spent 30 minutes doing laundry, 15 minutes cleaning the bathroom, a certain amount of time cleaning her room, and 40 minutes doing homework. If she spent a total of two hours on these tasks, how long, in minutes, did she spend cleaning her room?
  Can you show me the way?
conversations.from: assistant
conversations.value: There are 30+15+40=85 minutes accounted for.
  She spent 2*60=120 minutes.
  She spent 120-85=35 minutes cleaning her room.