repurposing Substack posts into multiple NOTES

I entered several Substack posts and then requested Spiral to pull out 10, 3 to 4 sentence long Notes, but it responded “request conflicts with long form, so may not work as required…” (paraphrasing).

I need Substack Notes more than I need anything else. How do I achieve this without giving Spiral the long-form post that the Notes will be pulled from??

ariane@arianegoodwin.com

Thank you!!