Complex sentence: The station was originally opened on July 19,1909, as Hudson Terminal, but was torn down, rebuilt as World Trade Center, and re-opened on July 6,1971.
Split into simpler sentences: The station was originally opened on July 19,1909, as Hudson Terminal. As part of the construction of the World Trade Center, Hudson Terminal was torn down, rebuilt as World Trade Center, and re-opened on July 6,1971.