Complex sentence: Jarmila Kratochvílová (born 26 January 1951 in Golčův Jeníkov) was a late-developing Czech 400m runner whose career was dogged by injury and illness.
Split into simpler sentences: Jarmila Kratochvílová (born 26 January 1951 in Golčův Jeníkov) is a former Czech 400m runner. Along with a late development, her career was dogged by injury and illness.