1477
The extent of memory improvement evoked by DCE was 23 % at the dose of 200 mg / kg and 35 % at the dose of 400 mg / kg in young mice using elevated plus maze .
 Chemical: DCE
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: DCE 
Answer:
 Chemical: DCE