2629
AIM : Experimental and clinical studies have revealed that hippocampal DBS can control epileptic activity , but the mechanism of action is obscure and optimal stimulation parameters are not clearly defined .
 Disease: epileptic
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:
 Disease: epileptic