SINGAPORE - For years, they played together as young girls in a village in Aljunied. Neighbours then often asked Madam Thangah Koh, 72, and Madam Fatimah Mohidin, 71, if they were sisters. Madam Fatimah, a retired factory worker, said in Malay: "People said we looked alike and asked if we were sisters. I said I'm Malay, while Thangah is Indian....