19348
Amateur astronomers often contribute toward activities such as monitoring the changes in brightness of variable stars and supernovae , helping to track asteroids , and observing occultations to determine both the shape of asteroids and the shape of the terrain on the apparent edge of the Moon as seen from Earth .
 location: Moon
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: Moon 
Answer:
 location: Moon