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'.

Let me give you an example: De belle van het bal is Hillary
The answer to this example can be: Hillary: B-PER, Clinton: I-PER
Here is why: In the given sentence, Hillary is identified as the person name, which is correct.

OK. solve this:
Robert Verwilghen , vader van Marc , greep daarbij naast een zetel .
Answer:
Robert: B-PER, Verwilghen: I-PER, Marc: B-PER