<http://schema.org/keywords>
"Bullet train"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.hindustantimes.com/india/india-clears-japan-s-bid-for-first-bullet-train-ahead-of-abe-trip/story-rAKQkbZufreZHos6C1eodJ.html>