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: WWW : www.costreduction.nl/cvs/vergouw.html en www.strafschop.nl

Output: None


Input: Consider Input: Wie is zijn favoriet ?

Output: None


Input: Consider Input: Maar ik dacht : als ik alles geef en alles is kapot , dan weet ik tenminste dat ik naar huis moet gaan .


Output: None