If you are interested in knowledge graphs, I did a whole bunch of research and work on fine-tuning Inkbot to create knowledge graphs. The structure returned is proper YAML, and I got much better results with my fine-tune than using GPT4.
https://huggingface.co/Tostino/Inkbot-13B-8k-0.2
Here is an example knowledge graph generated from an article about the Ukraine conflict: https://gist.github.com/Tostino/f6f19e88e39176452c1a765cb7c2caff