A basic Named entity recognition (NER) with SpaCy in 10 lines of code in Python

Have you ever come to a situation that you find a bunch of old articles in your hard drive and you believe they were precious, however, you couldn’t remember what the articles are about. Or a situation that you remembered you read something in your archive and was trying to find out which document that was, however, you just could not find it. Well, it happened to me quite often. I hoped I could have an index to all the articles I stored so that I can locate them quickly. And now, I am trying to create a small piece of Python code to do that for me.