define key terms

[beanumber]

• [ ] social impact
• [ ] high-quality journalism

[beanumber]

@e-fukuda Please commit this to the repository. Markdown format is preferred.

[beanumber]

These still need to be refined. Do you have any references that will support these? I found two:

• http://socialimpact.umich.edu/about/what-is-social-impact/
• https://en.wikipedia.org/wiki/Social_impact_assessment

You want these definitions to be bullet-proof.