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: vrijdag , 2 juni 2000

Output: None


Input: Consider Input: Maar ondanks die mindere nachtrust blijft de schooldag even lang duren en is hij net zo veeleisend .

Output: None


Input: Consider Input: ' Mijn koninkrijk voor paars ... '


Output: None