sentence2_structure: Fission<>is<>the radioactive process used in nuclear power plants and one type of nuclear bomb$$$the radioactive process<>used<>in nuclear power plants and one type of nuclear bomb
sentence1: It is therefore present in radioactive waste and in the nuclear fallout of fission bomb explosions.
sentence2: Fission is the radioactive process used in nuclear power plants and one type of nuclear bomb.
question: What is the radioactive process used in nuclear power plants and one type of nuclear bomb?