GSoD 2019 : Review and Refactoring our Information Architecture for OpenMRS

This is not correct. Not all subject matter experts are volunteers.

Everyone who does something is a contributor, regardless of whether you are a volunteer or not.

Can you update the information which you think is out dated?

My suggestion is that you start with only those that you understand. Then we can continue to discuss and refine those that you do not.

How would you state this to make it clearer?