3009
To broaden our knowledge about the toxicity of metals in marine elasmobranchs , cannulated spiny dogfish ( Squalus acanthias ) were exposed to 20 mu M and 100 mu M lead ( Pb ) .
 Chemical: Pb
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: Pb