1979
CONCLUSION : Dexmedetomidine in high doses provides adequate sedation for pediatric MRI studies .
 Chemical: Dexmedetomidine
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: Dexmedetomidine 
Answer:
 Chemical: Dexmedetomidine