<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/07/25/130725103025_cats_304x171_afp_nocredit.jpg>
<http://bbchindi.com/hindi/learningenglish/2013/08/130809_cat_idioms.shtml>