Stephen Kweku Antwi alias �Bayerebon�, 34 and Nana Yaw Adu Gyamfi, 19, who robbed one Stephen Owusu-Ansah at Sefwi Anhwiaso in the Western Region at gunpoint and stabbed the victim in the process, were yesterday sentenced to a total of 200 years� imprisonment by the Takoradi Circuit Court �A�.