<http://schema.org/thumbnailUrl>
<https://en-us.help.blackboard.com/@api/deki/pages/7158/thumbnail>
<https://en-us.help.blackboard.com/Learn/9.1_Older_Versions/9.1_SP_12_and_SP_13/Instructor/060_Course_Tools/Journals/Editing_and_Managing_Journals>