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