Plans:
  {
  @elevatorenv( getAllEntities(), AE );
  print(allEntities(AE));
  @elevatorenv( getFreeEntities(), AE );
  print(freeEntities(AE));
  @elevatorenv( associateWith(car1), AW );
  print(associationResult(AW));
  @elevatorenv( goto(3,up) , GR);
  print(gotoResult(GR));
  skip
  }