18702
To explore the potential physical basis of the " hindering role " of self - organized interfacial water , the dynamical and structural properties as well as the status of hydrogen bonds ( H - bonds ) for interfacial water were investigated .
 Chemical: hydrogen; Chemical: H
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: hydrogen, H 
Answer:
 Chemical: hydrogen; Chemical: H