21574
The mass of an atomic nucleus is less than the sum of the individual masses of the free constituent protons and neutrons , according to Einstein 's equation E = mc .
 person: Einstein; location: E = mc
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: Einstein, E = mc 
Answer:
 person: Einstein; location: E = mc