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'.

Input: Consider Input: Bestellen is gemakkelijk : gewoon een klik op de muis .

Output: None


Input: Consider Input: Skateboard is een goede sport , het brengt evenwicht in het lichaam en in de geest .

Output: None


Input: Consider Input: Meer sport , betere seks


Output: None