1. Katie's children were playing on the driveway when she removed groceries from her car.
  2. After the freight train rolled by, the two children went to the tracks and knelt down to listen to the sound of
the train.
  3. The overhead lights signaled that the passenger express train was far from the tracks.
  4. When the freight train got to the top of the rise, the drivers noticed two kids on the tracks.
  5. Falzo stayed in the engine's cab and waved and shouted at the kids.