Vim editor entities tagging/annotation tool (for RASA)

Hi all

I posted a question on vim stackexchange:

Vim editor entities tagging/annotation tool

only apparently unrelated/off-topic (about RASA).

Instead I’m looking for a NER annotation system just to speed up intent/entities tagging in RASA YAMML files.

Please help me answering on stackexchange voting up the question if you think interesting the idea of a command line/vim editor tool to annotate RASA training set.

Related question: How to replace selected text T with some function(T), using a keyboard shortcut?

Any suggestion is welcome. Thanks
giorgio