4064
Cu ( 2 + ) had the lowest median effective activity ( EA50 ( M ) ) , compared with Ag ( + ) and Zn ( 2 + ) ( EA50 ( Cu ) = 2 . 60 x 10 ( - 8 ) M , EA50 ( Ag ) = 1 . 34 x 10 ( - 7 ) M , EA50 ( Zn ) = 1 . 06 x 10 ( - 4 ) M ) .
 Chemical: Cu ( 2 + ); Chemical: Ag ( + ); Chemical: Zn ( 2 + ); Chemical: Cu; Chemical: Ag; Chemical: Zn
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: Cu ( 2 + ), Ag ( + ), Zn ( 2 + ), Cu, Ag, Zn 
Answer:
 Chemical: Cu ( 2 + ); Chemical: Ag ( + ); Chemical: Zn ( 2 + ); Chemical: Cu; Chemical: Ag; Chemical: Zn