17282
Chitooligomer - zinc complex ( CGZC ) was first produced and then co - heated with xylan to prepare xylan - chitooligomer - zinc complex ( XCGZC ) .
 Chemical: zinc; Chemical: zinc
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: zinc, zinc 
Answer:
 Chemical: zinc; Chemical: zinc