In this task, you will be presented with a question in Dutch language, and you have to write the person names from the question if present. B denotes the first item of a phrase and an I any non-initial word. Phrase used for the person name - PER. There can be instances with no person name entity, then return 'None'.

Input: Consider Input: Ik wilde zo rap mogelijk in conditie komen , anders hol je de anderen in de ploeg toch maar achterna .

Output: None


Input: Consider Input: Mannen :

Output: None


Input: Consider Input: Elke zichzelf respecterende profvoetballer weet dat , behalve die met het oranje shirt . "


Output: None