12066
Exposure to low micromolar concentrations of Mn ( 2 + ) , but not divalent copper , cadmium , nickel , cobalt , zinc , and iron , induced a significant production of H2O2 from rat microglial but not astroglial cells .
 Chemical: Mn ( 2 + ); Chemical: divalent copper , cadmium , nickel , cobalt , zinc , and iron; Chemical: H2O2
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: Mn ( 2 + ); Chemical: divalent copper , cadmium , nickel , cobalt , zinc , and iron; Chemical: H2O2