Why do I not see Wikipedia references some text while analyzing using NLP

Question

Why do I not see Wikipedia references to Samuel, even though it is available while analyzing using NLP. But some entities have reference in the Entity extraction during google natural language-demo.

Kindly refer the below screenshot,

Answer 1

Please take a look at the numbers below the words: Samuel, colleague and Gnanavel.

The Wikipedia article is related to the Entity #2 which is Gnanavel, not to Samuel which is the Entity #1.

If you click on that link it will take you to the article of K. E. Gnanavel Raja

Also, as per the Entities analysis documentation you will find that, sometimes, the metadata associated to an entity includes Wikipedia URLs. This is why you might see these kind of articles for certain entities.