Complex sentence: Laine Erik-Kallas (born April 21,1942 in Särevere, Järva) is a retired female middle distance runner from Estonia, who twice represented the Soviet Union at the Summer Olympics: 1964 and 1968.
Split into simpler sentences: Laine Erik-Kallas (born April 21,1942) is a retired Estonian middle distance runner. She twice represented the Soviet Union at the Summer Olympics: 1964 and 1968.