18337
Here , we prepare a new type of micrometer - sized SERS substrate , core - shell microparticles composed of solid carbonate core coated with silver nanoparticles and polyhedral multishell fullerene - like structure , astralen .
 Chemical: carbonate; Chemical: silver; Chemical: fullerene
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: carbonate; Chemical: silver; Chemical: fullerene