<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://netdoctor.cdnds.net/16/11/980x490/landscape-1458299424-potatoes.jpg>
<http://www.netdoctor.co.uk/ask-the-expert/healthy-eating/a26535/does-eating-potatoes-cause-high-blood-pressure/>