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: Nu kan hij vrank en vrij zijn kans gaan , met alle vertrouwen .
Example Output: None

Example Input: Ik zal spelen zoals ik kan , en dan zien we wel .
Example Output: None

Example Input: Twee Brusselse milieubewegingen , Bral en Inter-Environnement ...
Example Output:
None