74907
A 2007 book , New Perspectives on Pottery Mound Pueblo ( Polly Schaafsma 2007 ) provides a general introduction to the site .
 Polly Schaafsma
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Polly Schaafsma