A 27-year-old woman was stabbed in the chest by a lunatic at a Chicago train station Saturday night — nearly three months after Ukrainian refugee Iryna Zarutska was murdered by a pocket knife-wielding madman on Charlotte’s light rail system. The assailant was walking along the UIC-Halsted Blue Line platform near the University of Illinois Chicago around 11:14 p.m. when he pulled a large knife from his backpack, approached the straphanger sitting on a bench and plunged it into her chest,