6974
The optical absorption of Cm ions contains three sharp peaks at 375.4 , 381.2 and 396.5 nanometers and their strength can be directly converted into the concentration of the ions .
 Cm
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cm