input:
  question: A building has 10 floors. At the ground floor, 7 people enter the elevator.
    At the second floor, 3 people get off and 2 people enter. At the fourth floor,
    5 people get off and 2 people enter. At the seventh floor, 1 person gets off and
    3 people enter. Finally, at the tenth floor, everyone remaining in the elevator
    gets off. The question is, How many people were in the elevator when it started
    its journey, and how many total people exited the elevator by the end of its journey?
output: "The elevator started its journey with 7 people. Following the instructions,
  we can keep track of the number of people \nentering and exiting each floor. By
  the tenth floor, 7 (initial) - 3 (floor 2) + 2 (floor 4) - 5 (floor 7) + 2 (floor
  \n10) = 3 people remain in the elevator. Therefore, the final number of people in
  the elevator is 3.\n\nAs for the total number of people who exited the elevator,
  we can calculate this by adding the initial number of people\nto the net change
  in the number of people in the elevator throughout its journey: 7 (initial) + (7
  - 3 + 2 - 5 + 2) = \n13 people.\n\nIn summary, there were 3 people in the elevator
  when it reached the tenth floor, and a total of 13 people exited the \nelevator
  during its journey."