21767
The most abundant n - alkanes were C ( 29 ) , C ( 31 ) , and C ( 27 ) ( 35 . 22 , 13 . 77 , and 12 . 28 % in average , resp . ) .
 Chemical: n - alkanes; Chemical: C; Chemical: C; Chemical: C
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: n - alkanes, C, C, C 
Answer:
 Chemical: n - alkanes; Chemical: C; Chemical: C; Chemical: C