License
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- Attribution 4.0 (CC BY 4.0)511
- Attribution 3.0 United States129
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- Public Domain Mark 1.048
- Attribution-NonCommercial-NoDerivs 3.0 United States41
- Attribution-ShareAlike 4.0 (CC BY-SA 4.0)28
- CC0 1.0 Universal25
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- Attribution-NoDerivs 3.0 United States7
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- Attribution-NoDerivatives 4.0 (CC BY-ND 4.0)4
- Apache 2.01
- Attribution-ShareAlike 3.0 United States1