Original sentence: Other groups were also persecuted and killed by the regime, including up to half a million Sinti and Roma (see Porajmos), as well as the disabled (see Action T4), homosexuals, Jehovah's Witnesses, Soviet POWs, Polish citizens, and political prisoners
Edited sentence: Other groups were also persecuted and killed by the regime, including 220,000–500,000 Sinti and Roma (see Porajmos), as well as the disabled (see Action T4), homosexuals, Jehovah's Witnesses, Soviet POWs, Polish citizens, and political prisoners