Route incoming Facebook messages (back) to Junk folder

When creating a "new" rule, Outlook asks for sender information: "Select from the options below to determine which messages are affected."

I chose "Sender" and "contains".

Then, the instructions state: "Step 2: What action do you want to apply?"

From drop-down in "Move to Inbox" list, I finally discovered I could choose the Junk folder.

However, I can't figure out how to indicate exactly who it is that I want to affect. The process never offers an option to describe the Sender.

Previously, this function worked. I know, because I've already got five similar rules in there.

Now, I'm stuck at this point. There's nowhere to insert my "Facebook" entry or any other partial Sender's name. I want these messages to go back to the Junk folder again.