1779
The long road from planethood to reconsideration undergone by Ceres is mirrored in the story of Pluto , which was named a planet soon after its discovery by Clyde Tombaugh in 1930 .
 location: Ceres; location: Pluto; person: Clyde Tombaugh
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Ceres; location: Pluto; person: Clyde Tombaugh