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:
De medische assistentie stelt afgescheurde ligamenten ter hoogte van het kniegewricht vast .

Ex Output:
None


Ex Input:
Dankzij de steun van Buenahora herstelde Casagrande even later wel het probleem .

Ex Output:
Buenahora: B-PER, Casagrande: B-PER


Ex Input:
" Het gaat om de manier waarop televisieprogramma's momenteel in Vlaanderen gemaakt worden .

Ex Output:

None