I’ve successfully converted Jupyter HTML-format simple tables to LaTex-format tables using pandoc.read(raw.text, ‘html’).blocks in a lua filter.  The resulting LaTex is \begin(longtable} …  That’s okay for simple tables, but longtable does not support nested tables, which I do need.

How to convert to LaTex tabular tables (which supports nested tables) rather than to longtable tables (which does not)?  Or is there some other solution to converting nested tables?