<http://schema.org/keywords>
"Birthdays"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.hindustantimes.com/tech/facebook-messenger-gets-a-new-home-sections-and-reminds-you-on-friends-birthdays/story-Rab3Qg75pkLGxu5z3K2yHJ.html>