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 combinatie van de twee ingrepen is een eerste experiment om de autokosten ' variabel ' te maken .
Example Output: None

Example Input: Ze zijn mooi , de schilderijen die Tzwern heeft verzameld
Example Output: Tzwern: B-PER

Example Input: Pieri ( Ita ) -- 7 .
Example Output:
Pieri: B-PER