It's interesting to see how this comes across to people who are outside our ML/NLP bubble. I can definitely relate to the feeling of being confused at why something that looks sort of basic is supposedly significant. It was actually very difficult to build, especially the active learning component for the named entity recognition system.
I'm a data scientist and getting annotations for our data is one of our most onerous issues. I upvoted this. If it works well, I could see myself using it all the time. Making a model that gets you most of the way there is the easy part; getting clean, annotated data. Uggh.