How are the relationships between answers recorded in the database?

Summary

How are the relationships between answers recorded in the database?

Content

I have tried looking through various documentation such as https://documentation.custhelp.com/euf/assets/devdocs/bui/topicres/c_bui_answer_relationships.html but still cant see the answer so how are the relationships between answers recorded in the database? Both for manual and sibling relationships. What table is the relationship in, and or what are the lining columns?

So for example if we had answer 2000, and it was manually related to 2001, 2002, 2003, where in the various tables in the database can this be found. 

Version

20B