<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/15/16/480x720/gallery-1428948036-54ff5f86ece6e-ghk-plants-you-cannot-kill-kalanchoe-s2.jpg>
<http://www.goodhousekeeping.com/home/gardening/advice/g1285/hard-to-kill-plants/>