5182
Mn ( 2 + ) is transported into cells via a number of mechanisms , while Mn ( 3 + ) is believed to be transported similarly to iron ( Fe ) via the transferrin ( Tf ) mechanism .
 Chemical: Mn ( 2 + ); Chemical: Mn ( 3 + ); Chemical: iron; Chemical: Fe
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Mn ( 2 + ), Mn ( 3 + ), iron, Fe 
Answer:
 Chemical: Mn ( 2 + ); Chemical: Mn ( 3 + ); Chemical: iron; Chemical: Fe