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: " Ik heb geweend , weet u .
Example Output: None

Example Input: " Waar ik ook stond of wat ik ook deed , de ballen floten me om de oren " , ondervond de Waal .
Example Output: None

Example Input: De kogel is door de kerk .
Example Output:
None