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: In 1986 hebben we Continental Foods volledig verkocht aan het Amerikaanse bedrijf Campbell Soup .
Example Output: None

Example Input: En dat wil Addis Abeba pas als er internationale garanties komen .
Example Output: None

Example Input: Wasserbillig
Example Output:
None