That's the hierarchical pattern from the post (small children for retrieval, parent section for generation), and it should help: the semantic fragments averaged 43 tokens, which is too thin to answer from, so swapping the section in addresses exactly that. I can't give you a number though. The 69% vs 54% figures come from the FloTorch benchmark, which didn't test that combination. I'd run it on your own corpus and measure end-to-end answer accuracy, not retrieval recall, since Chroma's 91.9% recall for semantic chunking suggests the retrieval side isn't the problem.