7490
The delta ( 13 ) C /1000 values of reference standard of E1 , E2 , and E3 were - 29 . 36 +/- 0 . 72 , - 27 . 98 +/- 0 . 35 , - 27 . 62 +/- 0 . 51 , respectively .
 Chemical: ( 13 ) C
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: ( 13 ) C