```
% pandoc -f markdown -t docx -o - | pandoc -f docx -t markdown --track-changes=all
I want [I left a comment.]{.comment-start id="0"
author="Jesse Rosenthal" date="2016-05-09T16:13:00Z"}some text to have a
comment []{.comment-end id="0"}on it.
^D
I want [I left a comment.]{.comment-start id="0"
author="Jesse Rosenthal" date="2016-05-09T16:13:00Z"}some text to have a
comment []{.comment-end id="0"}on it.
```