27
We analyzed the concentrations of 104 congeners of persistent organic pollutants , seven organotin compounds , five heavy metals , and methylmercury in 130 randomly selected placentas .
 Chemical: methylmercury
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: methylmercury