8022
In 1815 , Francis Ronalds published the first electric clock powered by dry pile batteries .
 person: Francis Ronalds
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Francis Ronalds 
Answer:
 person: Francis Ronalds