<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/05/15/140515144006_crops_512x288_reuters_nocredit.jpg>
<http://www.bbc.com/indonesia/majalah/2014/05/140515_iptek_elnino_pangan.shtml>