23594
The measured 298 K g - tensor ( principal values : 2 . 17 , 2 . 16 , 2 . 07 ) and copper hyperfine coupling tensor ( principal values : - 260 , - 190 , - 37 MHz ) were similar to the average of the 77 K tensor values pertaining to two neighboring histidine binding sites .
 Chemical: copper; Chemical: histidine
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: copper, histidine 
Answer:
 Chemical: copper; Chemical: histidine