10497
The THg concentrations were relatively low compared with fish from Europe and North America , and no samples exceeded the national limit recommended by the Standardization Administration of China ( 0 . 5 ng / g wet wt ) .
 None
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:  
Answer:
 None