Nested SHAPE

I'm using the following SHAPE command:

SHAPE {SELECT * FROM Chapters WHERE SchoolID=320}
APPEND ({SELECT * FROM ChapterLink}
RELATE ID TO ChapterID) AS Advisors
({SELECT FirstName, LastName FROM LocalAdvisors }
RELATE UserName TO UserName) AS AdvName

I get an error, "Column (UserName) does not exist in the appropriate rowset", which is correct, the UserName column actually exists in the ChapterLink table. But, I can't figure out how to construct this SHAPE command so that it works like that.