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'.

Example Input: Pluimvee werd enkel voor lokale consumptie geproduceerd .
Example Output: None

Example Input: Ze zijn mooi , de schilderijen die Tzwern heeft verzameld
Example Output: Tzwern: B-PER

Example Input: Van de Wouwer had al vroeg door dat Elli de te kloppen man zou worden .
Example Output:
Van: B-PER, de: I-PER, Wouwer: I-PER, Elli: B-PER