<http://schema.org/keywords>
"iPhone, samsung, test, video, iphone6S, TechRax, drop test, GalaxyS7"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.thinkapple.sk/2016/03/09/iphone-6s-vs-galaxy-s7-drop-test-ktory-z-nich-vydrzi-viac/>