76787
Si undergoes low-energy beta decay to P and then stable S. Si may be produced by the neutron activation of natural silicon and is thus useful for quantitative analysis ; it can be easily detected by its characteristic beta decay to stable P , in which the emitted electron carries up to 1.48 " MeV of energy .
 location: P
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: P 
Answer:
 location: P