13587
By attaching DOPA to an amine - functionalized polymer , a multiresponsive system is formed upon reaction with iron .
 Chemical: DOPA; Chemical: amine; Chemical: iron
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: DOPA, amine, iron 
Answer:
 Chemical: DOPA; Chemical: amine; Chemical: iron