36445
A Russian source produces germanium-68 from accelerator-produced helium ion ( alpha ) irradiation of zinc-66 , again after knockout of two neutrons , in the nuclear reaction Zn-66 + alpha -- > 2n + Ge-68 .
 None
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:  
Answer:
 None