15154
Raman and transmission electron microscopy indicate few - layers graphene patches with typical size of ~ 0 . 65 mu m in one dimension and ~ 0 . 35 mu m in the other .
 Chemical: graphene
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: graphene