33403
In these oxides , for every tin atom there are one or two oxygen atoms respectively ( SnO and SnO ) .
 location: SnO
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: SnO 
Answer:
 location: SnO