Teacher: 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'.
Teacher: Now, understand the problem? If you are still confused, see the following example:
De belle van het bal is Hillary
Solution: Hillary: B-PER, Clinton: I-PER
Reason: In the given sentence, Hillary is identified as the person name, which is correct.

Now, solve this instance: zijn niet te onderschatten troeven .
Student:
None