How the BBC is Duplicating Category Pages and Using Canonical Links
https://hackernoon.com/how-the-bbc-is-duplicating-category-pages-and-using-canonical-links-4m2z3ead
How the BBC is Duplicating Category Pages and Using Canonical Links
https://hackernoon.com/how-the-bbc-is-duplicating-category-pages-and-using-canonical-links-4m2z3ead