Complex sentence: Nicollier stayed in the Vukovar hospital until the fall of Vukovar on November 18,1991, when he was taken from the hospital by Yugoslav People's Army and local Serb forces, transported to the hangars at Ovčara farm.
Split into simpler sentences: Nicollier stayed in the Vukovar hospital until the fall of Vukovar on November 18,1991. The same day, he was taken from the hospital by Yugoslav People's Army and local Serb forces, transported to the hangars at Ovčara farm.