8906
To the best of our knowledge , this is the first example of the surfactant - assisted assembly of C ( 60 ) crystals .
 Chemical: C ( 60 )
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: C ( 60 )