Bulk edit WXR file

I have a WXR file that is not restoring as expected

I want them to look like the following post, minus the widgets and columns on either side of the post.
https://web.archive.org/web/20201027202840/http://www.lesc.net/blog/recommended-reading-range-why-generalists-triumph-specialized-world

The current WXR file is restoring the full content of the widgets as a single column.

There are about 2,000 posts.