21879
In addition , both phenolic concentration and DPPH scavenging activity in mild Fe - deficient treatments were comparable with those in Fe - sufficient treatments , but were higher than those in Fe - omitted treatments .
 Chemical: DPPH; Chemical: Fe; Chemical: Fe; Chemical: Fe
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: DPPH, Fe, Fe, Fe 
Answer:
 Chemical: DPPH; Chemical: Fe; Chemical: Fe; Chemical: Fe