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 woordvoerder verwijst naar artikel 2.3 en 7.6 van algemeen politiereglementen van de stad Brussel .
Example Output: None

Example Input: publicatiedatum
Example Output: None

Example Input: Agassi volgt slechte voorbeeld van de Belgen
Example Output:
Agassi: B-PER