请问after Mandela was set free from manual labor,he started a garden in the yard.这句话哪里错了

问题描述:

请问after Mandela was set free from manual labor,he started a garden in the yard.这句话哪里错了

没错.
自从Mandela从体力劳动中释放出来以后,在院子里他修建了一个公园.