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: Vanmiddag zijn temperaturen van 25 graden en meer bereikbaar .

Output: None


Input: Consider Input: Joker :

Output: None


Input: Consider Input: Zij deden hun plicht Ned 2 23.35


Output: None