Original sentence: Physicist and Manhattan Project participant Robert Serber said "Somehow the popular notion took hold long ago that Einstein's theory of relativity, in particular his famous equation , plays some essential role in the theory of fission
Edited sentence: As the physicist and Manhattan Project participant Robert Serber put it: "Somehow the popular notion took hold long ago that Einstein's theory of relativity, in particular his famous equation , plays some essential role in the theory of fission