<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/480x576/550050be58c90-tramontina-stainless-stovetop-pressure-cooker-1010-s3.jpg>
<http://www.goodhousekeeping.com/appliances/pressure-cooker-reviews/g2036/best-stovetop-and-electric-pressure-cookers/>