answer: Frank and #Person1# stop due to a strange noise and find out they need to add water to the car.
documents: #Person1#: Frank, do you hear that strange noise?
  #Person2#: Yes, I noticed it a while ago. It seems to be coming from the engine.
  #Person1#: What should we do?
  #Person2#: I don't know. Perhaps we should slow down and stop at the next parking lot to see what the matter is.
  #Person1#: OK. Let's do that.
  #Person2#: Oh, it is red hot! We have run out of water.
  #Person1#: How is the engine itself? Is it OK?
  #Person2#: I think it's alright. Let's wait till it cools down a bit and then add some water.