I have unsuccesfully trying to find something that accomplish the following: I'm interested in the people that a person is following. I could check every person of that list manually, but it is a huge list. I'd like to filter the people of that list according to a criteria like some words of their descriptions. Example: John is following 1000 persons. I want to filter the persons who have Spain in their profile description. Or I want to filter the persons who have written United States in some tweet. How to do it with Twitter? Is it possible? Is it possible with a 3rd application?
I have answer my own question here: https://twittercommunity.com/t/get-all-the-users-somebody-is-following-to-filter-the-ones-that-have-a-text-in-their-description/57143