Search for photos with missing titles

[scot.hacker]

We had a thread here a while back about how it's not currently possible to view or edit image titles directly in the grid view (so frustrating, coming from Apple Photos). Meanwhile, I'm still trying to track down images in my collection with missing titles. Figured I'd be able to build a smart query to do this, but it doesn't seem possible - I don't even see Title as one of the searchable fields in the search tool. Am I missing something? Thanks. 

[scot.hacker]

For comparison, it's hard to think of a query you can't execute in Apple Photos as a "smart album":