Complex sentence: Vũ Ngọc Đỉnh was a Mikoyan-Gurevich MiG-21 pilot of the Vietnamese People's Air Force, he flew with the 921st fighter regiment and tied for fourth place amongst Vietnam War fighter aces with six kills (four solo, two shared).
Split into simpler sentences: Vũ Ngọc Đỉnh was a Mikoyan-Gurevich MiG-21 pilot of the Vietnamese People's Air Force. He flew with the 921st fighter regiment and tied for fourth place amongst Vietnam War fighter aces with six kills (four solo, two shared).