Thank you, Katka. Since they were so young, it seems like the parents' names should have been mentioned.
If Anna was 19 when she married, that makes her birth about 1766. Of the 6 Anna Markin records in the "super index", the one I listed above (snimek 101) fits the best. (Two of the 6 are from other villages, the other three from Vechnov were in years 1756, 1759, and 1782.) This record is so clear, anyone can read it!