Complex sentence: Finally, in 1968 when once again Soviet Union troops invaded Prague after the Prague Spring and occupation seemed inevitable, Heda Margolius Kovály fled Czechoslovakia and made a living in Boston, Massachusetts until she returned to Prague with her husband in 1996.
Split into simpler sentences: Finally, in 1968 when once again Soviet Union troops invaded Prague after the Prague Spring and occupation seemed inevitable, Heda Margolius Kovály fled Czechoslovakia. She made a living in Boston, Massachusetts until she returned to Prague with her husband in 1996.