How to create new table that pivots columns based on dynamic values in existing column

A co-worker helped me figure out the solution.

I used a Summarize operation, and then on the calculated column, did a double filter. The insider FILTER operation matches all rows to the current Failure via an EARLIER operator. The outer FILTER then matches all rows where the "Audience" field equals a specific value. It isn't quite dynamic (I am hard coding to look for specific values in the Audience column, which in my case are a finite set), but it gets the job done.