[mohi13]

Can also you Dataturks do a similar thing, hooking up with Mturks/your own team..also allows overlapping selection and NER+Classification etc. Adding extra data and much more.

Here is an online demo:

https://dataturks.com/projects/Dataturks/Demo%20Document%20A...

[varal7]

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