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: " Ik heb geweend , weet u .
Example Output: None

Example Input: Ik heb ook het scoringspercentage van de gemiddelde Nederlandse voetballer vanop elf meter onderzocht .
Example Output: None

Example Input: " Voorlopig kunnen we de opdrachten nog aan .
Example Output:
None