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: Maar het is niet mijn taak om te zeggen hoe dat uitgevoerd moet worden .
Example Output: None

Example Input: Er wordt van mij nu nog meer verwacht dan vroeger .
Example Output: None

Example Input: Beterschap is ook structureel
Example Output:
None