4703
A testimonial was awarded to Bishop by the Royal Astronomical Society in 1848 " for the foundation of an observatory leading to various astronomical discoveries " and presented to him with a warmly commendatory address by Sir John Herschel .
 organization: Royal Astronomical Society; person: John Herschel
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: Royal Astronomical Society, John Herschel 
Answer:
 organization: Royal Astronomical Society; person: John Herschel