<https://secure.gravatar.com/avatar/20f32b42bb619a9927b90c3de434edc2?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ImageObject>
<https://migratedata.co.uk/data-cleaning/keys-to-cleaning-success/>