Include Parent Value as well as Field Value on on Improvement Register

We ask our users to identify the Root Cause of an incident in the form of Root Cause Level I and Level II. For example, if it was a Root Cause Level I of "System/Technology: Error, then we ask them to further drill down and tell us if it was due to: Outage, Defect (known, unknown), or limitation. We configured this as a conditional selection in the input form. Unfortunately, only the Level II secondary value is displayed on the incident detail, not the Level I Parent Value. We would like the whole relationship to be displayed.