23390
Among others , the most important is U , which is a final product of transformations of Th irradiated by slow neutrons .
 location: U; location: Th
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: U, Th 
Answer:
 location: U; location: Th