License
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- Attribution 4.0 (CC BY 4.0)166
- Attribution 3.0 United States70
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- Attribution-NonCommercial-NoDerivs 3.0 United States21
- CC0 1.0 Universal20
- Attribution-NonCommercial 4.0 (CC BY-NC 4.0)18
- Attribution-NonCommercial-ShareAlike 4.0 (CC BY-NC-SA 4.0)10
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- Apache 2.01
- Attribution-NonCommercial 3.0 United States1