Complex sentence: Netting was controversially placed in front of this stand in the early 1990s, following the disaster at Hillsbrough Stadium in 1989, which was, after a short time, removed.
Split into simpler sentences: Netting was controversially placed in front of this stand during the early 1990s, after the disaster at Hillsborough Stadium in 1989. The netting was, after a short time, removed.