<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/75755000/jpg/_75755334_c0129286-aerial_spraying_of_pesticides-spl.jpg>
<http://www.bbc.com/news/science-environment-27980344>