4070
The TEQ at the 50 % response level ( TEQ50 , Cu ( 2 + ) equivalents ) for Cu ( 2 + ) - Zn ( 2 + ) mixtures was significantly lower than the value for Cu ( 2 + ) - Ag ( + ) mixtures .
 Chemical: Cu ( 2 + ); Chemical: Cu ( 2 + ) - Zn ( 2 + ); Chemical: Cu ( 2 + ) - Ag ( + )
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 + ), Cu ( 2 + ) - Zn ( 2 + ), Cu ( 2 + ) - Ag ( + ) 
Answer:
 Chemical: Cu ( 2 + ); Chemical: Cu ( 2 + ) - Zn ( 2 + ); Chemical: Cu ( 2 + ) - Ag ( + )