Interfaces 101: Build Forms and Other Interfaces

I am working on the following step in the Interfaces 101: Build Forms and Other Interfaces shown below. 

I have run into an issue with configuring the rule inputs. The directions are unclear to me and I am receiving the following error: 

I have named the rule input "vehicle" and made it a W777SA Vehicle data record type. I'm uncertain what the value for the "Value" field should be. 

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