29589
Similarly , 20 % increase in alum dosage causes 7 . 1 % increase in the total annual cost , while 20 % decrease results in 7 . 9 % decrease in the total annual cost .
 Chemical: alum
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: alum 
Answer:
 Chemical: alum