Complex sentence: On September 19, one Gnat and two Sabres were downed over Chawinda, while the following day, another two Hunters and an F-86 Sabre were lost over Kasur, Pakistan.
Split into simpler sentences: On September 19, one Gnat and two Sabres were downed over Chawinda. The following day, another two Hunters and an F-86 Sabre were lost over Kasur, Pakistan.