<https://secure.gravatar.com/avatar/4064daa8b68c39dc2649ade91a573aaf?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://cleanupgeek.com/vacuum-cleaner-with-hepa-filter-asthma-sufferers/>