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'.

Input: Consider Input: Puur materiaal-technisch bekeken doen we mee met de betere Europese landen .

Output: None


Input: Consider Input: De premier van Thailand , Chuan Leekpai , vroeg KÃƒÆ’Ã‚Â¶hler lering te trekken uit " wat in ons land is gebeurd " .

Output: Chuan: B-PER, Leekpai: I-PER, KÃƒÆ’Ã‚Â¶hler: B-PER


Input: Consider Input: Ik heb het kabinet enkel gewezen op het risico . "


Output: None