19827
Insight into the Aqua - Hydroxo <--> Hydroxyl Equilibrium : A Combined Experimental and Theoretical Study .
 Chemical: Aqua - Hydroxo; Chemical: Hydroxyl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Aqua - Hydroxo; Chemical: Hydroxyl