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: Preventie wordt ondertussen meer in de verf gezet .
Example Output: None

Example Input: Grenstwist verdeelt Hoorn van Afrika
Example Output: None

Example Input: Europese Commissie geen voorstander van algemeen verbod op kadavers in veevoeders
Example Output:
None