$ sudo apt-get update
$ sudo apt-get install libhtml-wikiconverter-markdown

libhtml-wikiconverter-markdown is installed in your system.

Make ensure the libhtml-wikiconverter-markdown package were installed using the commands given below,

$ sudo dpkg-query -l | grep libhtml-wikiconverter-markdown*

You will get with libhtml-wikiconverter-markdown package name, version, architecture and description in a table

libhtml-wikiconverter-markdown package basic information: