<https://secure.gravatar.com/avatar/862d4fc88c28896e89dc502fc48f8e47?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://trampolineflight.com/are-round-or-rectangular-trampolines-safer/>