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'.
One example: De belle van het bal is Hillary
Solution is here: Hillary: B-PER, Clinton: I-PER
Explanation: In the given sentence, Hillary is identified as the person name, which is correct.

Now, solve this: Per overschrijding van de Europese gezondheidsnorm ( 120 microgram ozon per kubieke meter gedurende minstens acht uren ) , eisen de twee verenigingen vijftig miljoen Belgische frank .
Solution:
None