How to represent disjoint subclasses

Hi

How do you represent disjoint sublcasses in VP-UML (v4.1)?

Eg class Person has sublcasses Male and Female. The sublcasses are obviously disjoint, but I can’t get VP-UML to draw that. I can get Male and Female to be subclasses with separate arrows, but not with a ‘joint’ arrow as is standard notation.

Any help appreciated.

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