Check out the Apollo client, a dedicated Q&A platform built on the Nostr protocol. Unique to Apollo are custom event kinds (31993 and 32017) for efficient integration, visibility and organization of content with the hope of facilitating specialized clients for Q&A. 

To learn more check out this post by @samuelralak
https://w3.do/jHNDFf3t

You can also visit Apollo at 
https://www.apolloqa.org
or on GitHub at 
https://github.com/samuelralak/apollo