Alright Nick, Question 7 — this one is about the Knowledge Base and RAG architecture: GPTWeb uses RAG (Retrieval Augmented Generation) to power AI responses. Explain what a Collection is, how documents get processed after upload, what chunking does, and why semantic search produces better results than keyword search. Bonus: what role does the Collection description play? You've dug into RAG architecture before — let's see how deep it goes.