79562
By using the mass–energy equivalence , Einstein showed , in addition , that the gravitational mass of a body is proportional to its energy content , which was one of early results in developing general relativity .
 person: Einstein
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 
Answer:
 person: Einstein