26941
When tested in a rodent version of the set - shifting task , rats with a DMS lesion displayed a greater number of errors during the reversal stages of the task than sham lesion controls but the nature of the errors did not differ between the two groups .
 None
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:  
Answer:
 None