How to place inlines inlines on a page?

Question

Django

Let's say we have models with the following hierarchy:
Course -> Subject -> Theme -> Test -> Answer
Inline allows you to place a child model on the parent edit page, we already have an example. You can add answer options right on the Test page. But here's the problem: In Theme, with the same approach, only Test inlines will be displayed, but Answer will have to be added separately, going into each Test object. Very uncomfortable.
Are there any solutions to this problem in standard Django?