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He is the author of 20 books and 200 articles ; two of his books ( American Indian languages : The historical linguistics of Native America and Historical Syntax in Cross-Linguistic Perspectives , co-written with Alice C. Harris ) were awarded the Leonard Bloomfield Book Award by the Linguistic Society of America for the best book in linguistics published in the previous two years .
 Linguistic Society of America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Linguistic Society of America