In this problem, you will create a program that defines a Shape base class with Circle and Rectangle subclasses, implements a static method that uses the instanceof operator to determine an object's type and return its class name, and displays the result to standard output.

Create a Shape base class, and Circle and Rectangle subclasses. Implement a static method getShapeName(Shape shape) that uses instanceof to return 'Circle', 'Rectangle', or 'Unknown Shape'.