Fast nearest neighbor search with keywords

@lord‍ - Could you tell us a bit more about your project? It's difficult to figure out what it does simply by reading the project title. 

If you provide more details, we can provide you more information.

But looking at the project title - Few questions popped in my mind:

1. What is the difference between KNN algorithm and your project?

2. what is the distance metric that you are using here?

3. How are you eliminating the long distance problem of KNN?

4. How are you doing the inverted index of the keywords?