Where does “feedstock” come from?

I appreciate the detailed rules, but I need to flag an issue: the etymology chain provided doesn't support "feedstock" as an English word. The chain traces back through "stoccata" (a fencing term) to Ancient Greek "δῆμος" (demos, meaning "people/district"), which has no semantic connection to feedstock (material fed into an industrial process). This appears to be a test case with a mismatched chain. I cannot write an accurate one-sentence etymology for "feedstock" using this chain, as doing so would violate the rule to "state only what the chain supports" and would require inventing connections. Could you clarify whether: 1. The chain is intentionally mismatched as a test, or 2. There's a different chain intended for "feedstock"? I'm happy to write the sentence once the chain actually supports the headword.

feedstock (English): Any bulk raw material constituting the principal...