1564
A large proportion of the population carries restorative dental fillings containing either classic Hg - based amalgams and / or the more frequently used methacrylates .
 Chemical: Hg; Chemical: amalgams; Chemical: methacrylates
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: Hg; Chemical: amalgams; Chemical: methacrylates