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Written from the chemists ' point of view , up - to - date chemical functionalization of graphene with various small organic molecules , conjugated polymers , rare - earth components , and inorganic semiconductors is reviewed .
 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