3383
This is due to the satellites ' low density and their surfaces lying close to the edge of their Roche spheres .
 location: Roche
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: Roche 
Answer:
 location: Roche