15240
The transformation of selenate by the process is modeled based on a heterogeneous reaction coupled with electrochemical generation of ferrous and hydroxide .
 Chemical: selenate; Chemical: ferrous; Chemical: hydroxide
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: selenate, ferrous, hydroxide 
Answer:
 Chemical: selenate; Chemical: ferrous; Chemical: hydroxide