7466
In sharp contrast to other two - dimensional materials ( truly planar graphene and h - BN ) , here the edge dislocations extend in third dimension , forming concave dreidel - shaped polyhedra .
 Chemical: graphene; Chemical: h - BN
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; Chemical: h - BN