Smart collection showing photos without face recognition

[mremijan]

I've started using the face recognition feature in LR. So far it has been a real time saver for me. I think it's working pretty well. However, I'd like to use a Smart Collection to be able to find photos that do NOT jave facial recognition keywords. I know the keywork attributes have a flag indicating it's a person from facial recogniation, but is there a way to setup a smart collection to use this? 

[johnrellis]

[This post contains embedded images that don't appear in email. View the post in your Web browser to see the images.]

Put all of your keywords with the Person attribute under a parent keyword "People". Then use a smart collection with the criteria:

To put all your Person keywords under People:

1. Create a "People" keyword with the Person attribute.

2. In the Keyword List panel, click the People filter:

3. Select the first person keyword and shift-click the last one, and drag them onto the People keyword.

[Use the reply button under the first post to ensure replies sort properly.]

[johnrellis]

Also:

4. In the Keyword List panel, right-click the People keyword and do Put New Person Keywords Inside This Keyword.  This causes any new person keywords to be added under People.