15647
Ezogabine exerts its therapeutic effect by enhancing transmembrane potassium channels ( KCNQ ion channels ) , which is a novel mechanism in comparison with other antiepileptics .
 Chemical: Ezogabine; Chemical: potassium
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: Ezogabine, potassium 
Answer:
 Chemical: Ezogabine; Chemical: potassium