Sample File Attribution
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| Filename       | Author           | URL                                                                  |
|----------------|------------------|----------------------------------------------------------------------|
| animated.gif   | Stephanie Yvonne | <https://commons.wikimedia.org/wiki/File:01_Das_Sandberg-Modell.gif> |
| pythagoras.gif | Petrus3743       | <https://commons.wikimedia.org/wiki/File:01-Satz_des_Pythagoras.gif> |