1269
The findings imply that the efficiency - determining step of the halogen photosubstitution is simple formation of a sigma - complex through electron - paired bonding within the triplet manifold .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities:  
Answer:
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