4347
To explore the hypocholesterolaemic components in the fat fraction of freshwater clam extract ( FCE ) , we further fractionated the fat fraction by silica gel column chromatography into nine fat subfractions .
 Chemical: silica gel
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: silica gel 
Answer:
 Chemical: silica gel