<https://geo-nii.org/#/schema/person/image/>
<http://schema.org/url>
<https://secure.gravatar.com/avatar/afa8bff1bbcf59e5a464191ca613bdbe?s=96&d=mm&r=g>
<https://geo-nii.org/overcoming-first-cost-barrier-with-utility-ownership-of-the-ground-loop/>