<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/480x552/54fea20193ff1-zep-commercial-heavy-duty-oven-and-and-grill-cleaner-xln.jpg>
<http://www.goodhousekeeping.com/institute/g226/multi-tasking-products/>