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Magnesium ( Mg ) concentrations in diets have been associated with performance and eggshell quality of laying hens , but the results have been inconclusive .
 Chemical: Magnesium; Chemical: Mg
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: Magnesium; Chemical: Mg