1266
The relative nucleophilicities vary somewhat with the attack site ; they are about 5 : 2 : 1 for cyanide ion , hydroxide ion , and pyridine for attack at the halogen - bearing carbons .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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