14821
Binding studies could not be conducted with Au ( III ) , Al ( III ) , Zn ( II ) , Cu ( II ) , and Ni ( II ) , as these precipitated both proteins .
 Chemical: Au ( III ); Chemical: Al ( III ); Chemical: Zn ( II ); Chemical: Cu ( II ); Chemical: Ni ( II )
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: Au ( III ), Al ( III ), Zn ( II ), Cu ( II ), Ni ( II ) 
Answer:
 Chemical: Au ( III ); Chemical: Al ( III ); Chemical: Zn ( II ); Chemical: Cu ( II ); Chemical: Ni ( II )