It has last names of one man then two women... Do I index this or return it as no extractable data?
Your batch is an index to marriages, and because it has names and page numbers it should not be indexed.
In addition, a article in the help center called How do I index records with indexes? explains about indexes:
An index includes only names and page numbers, and is usually not indexed because that information is included elsewhere in the project.
You can mark in step 1: Should this image be indexed? No, no extractable data? and submit.