30377
The nu 1 vibrational ( OH stretch ) spectrum and the A - X electronic spectrum of HMP were detected by Infrared Cavity Ringdown Spectroscopy ( IR - CRDS ) , and assignments were verified with density functional calculations .
 Chemical: OH; Chemical: HMP
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, HMP 
Answer:
 Chemical: OH; Chemical: HMP