The names of Clergy and Musicians are added into lists.
The Add Button adds a name to the list and the Delete Button removes a name. The Notes button below the Musicians list is a Note field for the entry of the Musical Selections.
If you click on a name in these lists, it will be highlighted and an ellipses will appear.
Doing so reveals that these names are actually Name Fields. Like all name fields you may click on the ellipses to bring up the underlying Person information from your Address Book.
Similarly, when you click on the Role Field in the musicians list, a triangle will appear revealing that this field is a List.