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: De maatschappij bezat toen al 39 procent van Tractebel .

Output: None


Input: Consider Input: " Omdat we nog altijd informatie doorgespeeld krijgen dat er nog epo wordt genomen . "

Output: None


Input: Consider Input: De kinderen werden 's nachts even vaak en even lang wakker .


Output: None