20873
There is some evidence that oxidized derivatives of cholesterol , 7 - ketocholesterol ( 7KC ) and 7 beta - hydroxycholesterol ( 7 beta OHC ) , are increased in the plasma of patients with neurodegenerative diseases associated with demyelinization of the central nervous system ( CNS ) .
 Chemical: cholesterol; Chemical: 7 - ketocholesterol; Chemical: 7KC; Chemical: 7 beta - hydroxycholesterol; Chemical: 7 beta OHC
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: cholesterol, 7 - ketocholesterol, 7KC, 7 beta - hydroxycholesterol, 7 beta OHC 
Answer:
 Chemical: cholesterol; Chemical: 7 - ketocholesterol; Chemical: 7KC; Chemical: 7 beta - hydroxycholesterol; Chemical: 7 beta OHC