17107
The most significant electrodes for ascorbic acid prediction were Ni and Ag for SS , and Ag and Ir for BS where positive pulses were more suitable than negative ones .
 Chemical: ascorbic acid; Chemical: Ni; Chemical: Ag; Chemical: Ag; Chemical: Ir
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: ascorbic acid, Ni, Ag, Ag, Ir 
Answer:
 Chemical: ascorbic acid; Chemical: Ni; Chemical: Ag; Chemical: Ag; Chemical: Ir