17087
The levels of cholesterol oxides found in these products during winter may encourage researchers to investigate the composition of oysters cultivated in different climates all over the world .
 Chemical: cholesterol oxides
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 oxides 
Answer:
 Chemical: cholesterol oxides