27369
Group 1 consisted of 67 dentists ; group 2 consisted of 21 dental personnel who work with amalgam , and group 3 consisted of 27 control subjects who work in the same hospital but are non - dental personnel .
 Chemical: amalgam
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: amalgam