8967
Different dissociation patterns have been noted not only between the homo - and heterochiral octamers , but also between the two - OH stretching vibrational bands of the same chirality species .
 Chemical: OH
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: OH 
Answer:
 Chemical: OH