1265
The relative rates for attack at the halogen - bearing carbons for F / Cl / Br / I are 27 : 1 . 9 : 1 . 9 : 1 ( cyanide ion ) , 29 : 2 . 6 : 2 . 4 : 1 ( hydroxide ion ) , and 39 : 3 . 9 : 3 . 5 : 1 ( pyridine ) , respectively .
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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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