Complex sentence: During this period 7500 patients have been treated for prostate cancer at the Jean Monnet Hospital in Epinal, France: investigations showed that 5 persons died from radiations, 24 where severely injured, 700 where significantly overexposed and 4500 more mildly.
Split into simpler sentences: During this period 7500 patients were treated for prostate cancer at the Jean Monnet Hospital in Epinal, France. An investigation showed that 5 persons died from radiations, 24 were severely injured, 700 where significantly overexposed and 4500 more mildly.