17243
The analytical data show that the ratio of ligand to metal in metal complexes is 1 : 1 and 1 : 2 for Fe ( 3 + ) and Mn ( 2 + ) , respectively .
 Chemical: Fe ( 3 + ); Chemical: Mn ( 2 + )
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: Fe ( 3 + ); Chemical: Mn ( 2 + )