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We employed restriction - site - associated DNA sequencing ( RAD - seq ) to identify SNPs in natural populations of the sea anemone Nematostella vectensis , an emerging cnidarian model with a broad geographic range in estuarine habitats in North and South America , and portions of England .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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