Database setup with facts for the LLM to use?

My use case is usually micro-code/boilerplate or casual nonsense philosophy but last night i tried to get a bit deep into movies and actors with Qwen3.5 and it became quickly obvious that the information wasn't even close to the truth, as in totally off when it came to actor details, which is fine its a local LLM after all and i don't expect it to generate factual niche details.