def pilot_pos(data):
    """
        Parse string containing information about pilot's position coordinates.

        Input:
        `data`      # A string in '{id}:user{id}_{id};{x};{y};{z}' format,
                    # where x, y, z are integer values of pilot's coordinates.
                    # Example:
                    # "0:user0_0;100;200;300"

        Output:
        An object containing information about pilot's callsign and
        coordinates.
        """
