Complex sentence: One of their number, Petra Schelm runs a police roadblock and is gunned down, an action which only angers the RAF and leads to a campaign of bomb attacks directed at German authorities as well as American military personnel based in West Germany.
Split into simpler sentences: One of their number, Petra Schelm runs a police roadblock and is killed in a shoot-out with the police. This action only angers the RAF and leads to a campaign of bomb attacks directed at German authorities as well as American military personnel based in West Germany.