求翻译：其中少数人联系上了历史上著名的“地下铁路”组织，到达了安全之地，从此获得了解放。但也有人很不幸，被抓回到种植园，受主人虐待，干活时被迫戴着脚镣。是什么意思？

Few of them contacted the historic "underground railway" organization, to reach a safe place, obtained from the liberation. But others, unfortunately, was arrested back plantations, by the owner of abuse, forced to work wearing leg irons.

One of the few who contacted the history of the famous "underground railway" organization, had arrived at a safe place, he acquired liberation. But it was also very unfortunately, plantations, was captured by the masters to return to work, when abuse was forced to wear shackles.

Small number of people related in the history famous “the underground railway” the organization, arrived place of the security, from this time on has been liberated.But also some people very unfortunate, is grasped returns the plantation, is maltreated the master, works when is compelled to wear the

Few was connected to the history of the famous "underground railway" Organization, arrived in safe places, to obtain the liberation. But some unfortunately caught back to plantations, owner abuse, while working forced with leg.

Few of them contacted the historic "underground railway" organization, to reach a safe place, obtained from the liberation. But others, unfortunately, was arrested back plantations, by the owner of abuse, forced to work wearing leg irons.