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In Rain of the Children , Ward further explores the subject of his earlier film , In Spring One Plants Alone when , as a young film student he travelled to the Ureweras and documented the lives of an elderly Māori woman ( Puhi ) and her schizophrenic son ( Niki ) .
 Ward
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ward