Looping through specific config sections.

Okay, so I have this config:

Code:

redstonefreak589:
  clan:
    title: "Clan1"
    owner: "true"
 
 
bobwilson101:
  clan:
    title:"Clan1"
    owner: "false"
 
Notch:
  clan:
    title:"Clan2"
    owner: "true"

And what I want to do is loop through each player and get their clan title. If the clan title equals an argument, then set their clan option to "null". How would I do this?

Of course, the names aren't real, they were changed to conceal data.

SO SORRY! I didn't mean to create two posts, my internet was being weird, so I thought this didn't post. Can someone delete it or tell me how? Again, VERY SORRY!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.