License
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- Attribution 4.0 (CC BY 4.0)286
- Attribution 3.0 United States77
- Attribution-NonCommercial 4.0 (CC BY-NC 4.0)37
- Public Domain Mark 1.037
- Attribution-NonCommercial-NoDerivatives 4.0 (CC BY-NC-ND 4.0)30
- CC0 1.0 Universal28
- Attribution-NonCommercial-NoDerivs 3.0 United States25
- Attribution-ShareAlike 4.0 (CC BY-SA 4.0)15
- Attribution-NonCommercial-ShareAlike 4.0 (CC BY-NC-SA 4.0)14
- Attribution-NoDerivs 3.0 United States5
- Attribution-NonCommercial 3.0 United States5
- Attribution-NoDerivatives 4.0 (CC BY-ND 4.0)3
- Attribution-NonCommercial-ShareAlike 3.0 United States3
- Apache 2.01