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
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: Hg, amalgams, methacrylates 
Answer:
 Chemical: Hg; Chemical: amalgams; Chemical: methacrylates