Create diagram

[jamesaoverton]

@ddooley graciously volunteered to create a diagram. Here are the resources:

• Google Sheet: https://docs.google.com/spreadsheets/d/19aPuYxwN5qbfGkDc1hRGv9iTU0F_Gdo4G43-QJqk7B8/edit#gid=365304799
• OWL file: https://github.com/jamesaoverton/cob-data-demo/blob/master/src/demo.owl