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This study was undertaken to determine the concentration of cadmium in two shrimp species , namely , Penaeus semisulcatus and Penaeus monodon caught from the coastal areas in southern Iran .
 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