Request re Categories

I’m working on a document that will, in part, have the following structure;

Dangerous Journeys
-Mythus
–Lude
—Personas
—-Socio-Economics Class
—–SEC determination
—–SEC Demographics
—–Literacy Demographics
—–Class Relationships
—–Changing Class
——Up a class
——Down a Class

As you can see, I need to go deeper than just two subclasses

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