17960
The concentrations also increased with exposure time ; cadmium concentrations increased from 3600 +/- 310 ng / g to 8080 +/- 660 ng / g , from 1 to 4 wk , suggesting that further bioaccumulation may take place with even longer exposure time .
 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