Complex sentence: For pedestrians the nearest other crossings are the Greenwich foot tunnel and the Woolwich foot tunnel, or the Docklands Light Railway, from King George V station under the river to Woolwich Arsenal station, which opened in early 2009.
Split into simpler sentences: For pedestrians the nearest other crossings are the Greenwich foot tunnel and the Woolwich foot tunnel. The'Woolwich Arsenal extension' to the Docklands Light Railway, from King George V station under the river to Woolwich Arsenal station, which opened in early 2009.