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" Strepsodiscus " is an extinct genus of very primitive fossil snail-like molluscs from the early part of the Late Cambrian ( Dresbachian Age ) of North America .
 Late Cambrian, Dresbachian Age, North 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:
 Late Cambrian, Dresbachian Age, North America