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: Het is in deze rubriek al eerder geschreven .
Example Output: None

Example Input: Nog in deze Tour ' , maakte hij gisteren aan alle renners bekend .
Example Output: None

Example Input: " Hoe kunnen ze zeggen dat de oorlog gedaan is .
Example Output:
None