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: Zie ook pagina 6 , 1 jaar na de dioxinecrisis ( 5 )
Example Output: None

Example Input: Boek : ' De Strafschop , Zoektocht naar de ultieme penalty ' , 144 blz. ( Bestellen ?
Example Output: None

Example Input: Vraagtekens rond Vandenbroucke worden groter
Example Output:
Vandenbroucke: B-PER