3082
We found that metformin suppressed the progression of kindling , ameliorated the cognitive impairment and decreased brain oxidative stress .
 Chemical: metformin; Disease: cognitive impairment
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: metformin; Disease: cognitive impairment