Journey orchestrator exercise- Program participants

Hello all, first time poster hoping for some guidance, thanks in advance. I’m running through the Journey Orchestrator exercise, and am a bit confused about adding the right fields in the Query Builder step. The instructions suggest the following fields be added: “Add GSID of Company, Company Person,
Person ID , Email, Name of the CSM, etc.” Small issue, I’m unable to see “Company Person” as field that can be dragged into the “Show” section. It seems to be a parent category rather than one I can bring into “show”, is there a known field that is synced to the same data?