License
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- Attribution 4.0 (CC BY 4.0)626
- Attribution 3.0 United States189
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- Public Domain Mark 1.068
- Attribution-NonCommercial-NoDerivatives 4.0 (CC BY-NC-ND 4.0)60
- Attribution-NonCommercial-NoDerivs 3.0 United States54
- CC0 1.0 Universal46
- Attribution-NonCommercial-ShareAlike 4.0 (CC BY-NC-SA 4.0)25
- Attribution-ShareAlike 4.0 (CC BY-SA 4.0)24
- Attribution-NonCommercial-ShareAlike 3.0 United States9
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- Attribution-NoDerivatives 4.0 (CC BY-ND 4.0)5
- Attribution-NonCommercial 3.0 United States5
- Attribution-ShareAlike 3.0 United States2
- Apache 2.01