Advanced Functional Programming with Elixir: 1 struct per bounded context

I read chapters 1-3 so far.
I noted that the FunPark-Project has exactly one struct (domain-object) per bounded context.

I would be interested in a discussion about how to decide which domain-objects belong to which bounded context.

Thanks for writing this book, that shows DDD with elixir + very important concepts.

Cheers from Heiko