4148
Increasing concentrations of Mg in diets decreased ( linear and quadratic , P < 0 . 01 ) broken and shell - less egg production , but improved ( linear , P < 0 . 05 ) eggshell strength .
 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: Mg