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The altered four-parameter constructor calls only the three-parameter
constructor. Thus, the four-parameter constructor leaves it to the
three-parameter constructor to call the zero-parameter constructor in the
Attraction class.
*------------------* | Attraction: | | | | constructors: | | zero parameter <---* | | | *------------------* | ^ | | extends | *------------------* | | Movie: | | | | | | constructors: | | | three parameter ---* | ^ | | | | | four parameter | | | *------------------*