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Throughout the piece Duncan speaks of political , religious , and environmental ideas that are the basis of The River Why , The Brothers K ( 1992 , ISBN 0-553-37849-X ) , River Teeth ( 1996 , ISBN 0-553-37827-9 ) , My Story As Told By Water ( 2001 , ISBN 1-57805-083-9 ) , God Laughs and Plays : Churchless Sermons in Response to the Preachments of the Fundamentalist Right , ( ISBN 0977717003 ) as well as other essays and published writings .
 Duncan, River Teeth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Duncan, River Teeth