Thank you! I had no plans to add this feature in the immediate future (I also need to work on the project I built this for). I might consider doing it if people want it, in which case I will help brat for inspiration.

I will use* brat for inspiration

Good catch. Yes, it should be SMTP. Yes, you can extract multiple spans from the text.

This is a nice product! I appreciate that you made a free version: very valuable for students

There is a HN discussion about a similar model from 2016: https://news.ycombinator.com/item?id=11403653

Maybe this?

http://yearcompass.com