34884
Curium is produced in small quantities in nuclear reactors , and by now only kilograms of it have been accumulated for the Cm and Cm and grams or even milligrams for heavier isotopes .
 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