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: Analisten zijn tevreden over Colruyt
Example Output: None

Example Input: Maar hij maakt elektronische instructies en stuurt die naar de leerling .
Example Output: None

Example Input: " In 1996 was ik echt down , diep aangeslagen .
Example Output:
None