Individual #Leo_Szilard__Szilard  United States physicist and molecular biologist who helped develop the first atom bomb and later opposed the use of all nuclear weapons (1898-1964)
  type:  #nuclear_physicist__nuclearphysicist  a physicist who specializes in nuclear physics
  type:  #molecular_biologist__molecularbiologist  a biologist who studies the structure and activity of macromolecules essential to life

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