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: De medische assistentie stelt afgescheurde ligamenten ter hoogte van het kniegewricht vast .
Example Output: None

Example Input: De hamvraag is wat de eilandbewoners daar allemaal van denken .
Example Output: None

Example Input: De nettowinst per aandeel daalde ook met 13,4 procent .
Example Output:
None