I keep coming upon batches in the Seamen New England project that are notes/affadavits from doctors or other people swearing that they were born on such and such a date and in a specific place.
See here:
https://www.familysearch.org/indexing/batch/8042bca3-4b62-404e-bdb1-ec5ca3ae7e36
Is this relevant or do we mark it as no extractable data?