Write Up Complexity of Finding Sentencing Data

### Background on the problem the feature will solve/improved user experience
Overall, we've done work on finding sentencing data. It varies by County, State, Federal. Sometimes race data isn't available, sometimes it is. Sometimes it's not accessible readily on websites, sometimes it is. We'd like a concise write up about our challenges to bring to attention of policy groups that could help draw attention to this. Without great data, we are going to be limited in where our solution can be used.

### Tasks
Complete a write up of our experience. Cite places that did well vs. places that could improve.

### Acceptance Criteria
Approval by Open Sentencing Team.

郡、州、連邦の各レベルの情報源から量刑データを見つけるためにチームがこれまでに行った作業を確認してください。どの情報源が人種データを提供していて、容易にアクセスできるかを比較し、より優れた実践とより不十分な実践の例を挙げ、Open Sentencing Teamの承認に向けた簡潔な報告書をまとめてください。

索引モデルが issue の本文から書いたものです。