19564
The difference of the UV - vis / ECD spectra between two systems shows that the transition metal atom significantly influences on the chiroptical properties of the studied Strandberg - type POMs .
 Chemical: transition metal; Chemical: POMs
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: transition metal, POMs 
Answer:
 Chemical: transition metal; Chemical: POMs