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Recently , great efforts have been devoted to explore potential applications of graphene and its oxide in life science , especially in disease - related diagnostics , near - Infrared ( NIR ) phototherapy and imaging .
 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