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'.

Ex Input:
" Ik ben ontzettend blij met deze comeback .

Ex Output:
None


Ex Input:
Volgens de CFU houdt de dood van de blanke boer en de aanvaller geen rechtstreeks verband met de bezettingen van boerderijen door aanhangers van president Robert Mugabe .

Ex Output:
Robert: B-PER, Mugabe: I-PER


Ex Input:
( LB )

Ex Output:

LB: B-PER