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: " Ik ben nooit positief geweest .

Output: None


Input: Consider Input: Door naar Kongo te reizen en zich achter de territoriale eenheid van het land te scharen , heeft hij vertrouwen gekregen in Kinshasa .

Output: None


Input: Consider Input: Reportage , pagina 3


Output: None