130414
They are characterized mainly by their wing venation : in the forewings , vein 1b is not forked and veins 2-4 are separate , while veins 6-8 are not ; veins 6 and 7 are stalked and arise from vein 8 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None