8908
Mixtures of flower - shaped C ( 60 ) crystals and free - standing C ( 60 ) nanotubes are found in the 0 . 1 % C ( 12 ) G ( 2 ) / butanol system .
 Chemical: C ( 60 ); Chemical: C ( 60 ); Chemical: C ( 12 ) G ( 2 ); Chemical: butanol
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 ); Chemical: C ( 60 ); Chemical: C ( 12 ) G ( 2 ); Chemical: butanol