License
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- Attribution 4.0 (CC BY 4.0)797
- Attribution 3.0 United States221
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- Attribution-NonCommercial-NoDerivatives 4.0 (CC BY-NC-ND 4.0)85
- Public Domain Mark 1.083
- CC0 1.0 Universal73
- Attribution-NonCommercial-NoDerivs 3.0 United States71
- Attribution-ShareAlike 4.0 (CC BY-SA 4.0)37
- Attribution-NonCommercial-ShareAlike 4.0 (CC BY-NC-SA 4.0)33
- Attribution-NonCommercial-ShareAlike 3.0 United States19
- Attribution-NoDerivs 3.0 United States12
- Attribution-NoDerivatives 4.0 (CC BY-ND 4.0)11
- Attribution-NonCommercial 3.0 United States10
- Apache 2.01
- Attribution-ShareAlike 3.0 United States1