2758
The increase in free radical generation has been implicated as one of the important mechanisms of cognitive impairment by antiepileptic drugs .
 Disease: cognitive impairment
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: cognitive impairment 
Answer:
 Disease: cognitive impairment