Usage Policies

All content and datasets provided on this site are licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0).

What you’re free to do

• Share — copy and redistribute the material in any medium or format
• Adapt — remix, transform, and build upon the material

Under the following terms

• Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made.

No additional restrictions

You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

For any questions about usage or licensing, please contact us.