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: " In Parijs en andere grote steden heb je op openbare pleinen overal skaters en rollerbladers .
Example Output: None

Example Input: En precies daar wringt het schoentje .
Example Output: None

Example Input: Jongewaard kent Scholte niet .
Example Output:
Jongewaard: B-PER, Scholte: B-PER