4265
Class - 3 semaphorins , semaphorin - 3B ( SEMA3B ) and semaphorin - 3F ( SEMA3F ) , illustrate their effects by forming a complex with neuropilins ( NP - 1 or NP - 2 ) and plexins .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
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