On-site enterprise install of SP 2013.
I have a list called Questions. This list has a Title, ID, and a custom field called "Question" that is a Multiple Line of Text field set to type: Plain Text.
I've created a second list called LPA_Questions that contains a Lookup to my Questions list. So far so good. Although I should note that I notice when setting up this custom column, the Question column is not one of my choices to display - I'm only offered Id, Title, Modified, Created Version.
So, I'm trying to execute a _api/web query on the LPA_Questions list and expand the Question field.
This does not:
The query to field 'Question/Question' is not valid.
Am I missing something obvious here?