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'.
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Question: Britse AJ Walter Aviation verhandelde A-109 die onderschept werd in Oostende

Answer: None


Question: Zij laken de lakse houding van de Belgische en Brusselse overheden om het ozonprobleem fundamenteel op te lossen .

Answer: None


Question: Neen , sterke arbeidsbemiddelaars zijn Jan Leyers en Martine Prenen zeker niet .

Answer:
Jan: B-PER, Leyers: I-PER, Martine: B-PER, Prenen: I-PER