<http://schema.org/contentUrl>
<http://ocean.si.edu/sites/default/files/styles/465x300/public/photos/trematodes%20in%20fish%20-%20Stephanostomum_baccatum.jpg?itok=zynw4CaX>
<http://ocean.si.edu/blog/marine-parasites-crazy%E2%80%A6and-really-cool>