<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/12/550914b66be6a-1112-stem-cell-articles-xln.jpg>
<http://www.goodhousekeeping.com/health/a19497/stem-cell-research-treating-diseases/?click=smart&kw=ist&src=smart&mag=GHK&link=-SMT-GHK>