28554
The characteristics of structures and spectra of the water cluster cations reflect the formation of the hydronium cation moiety ( H3 O ( + ) ) and the hydroxyl radical .
 Chemical: hydronium; Chemical: H3 O ( + ); Chemical: hydroxyl
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: hydronium, H3 O ( + ), hydroxyl 
Answer:
 Chemical: hydronium; Chemical: H3 O ( + ); Chemical: hydroxyl