4070
The mean lead and cadmium contents obtained from 137 samples were 1 . 93 +/- 1 . 48 ( range : 0 . 18 - 6 . 11 ng / ml ) and 9 . 51 +/- 4 . 93 ng / ml ( range : 1 . 84 ng / ml - 30 . 50 ng / ml ) , respectively .
 Chemical: cadmium
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: cadmium