Complex sentence: The action was Čáslavská's silent protest against the recent Soviet invasion of Czechoslovakia, and was repeated when she accepted her medal for her floor exercise routine when the judges changed the preliminary scores of the Soviet Larisa Petrik to tie with Čáslavská.
Split into simpler sentences: The action was Čáslavská's silent protest against the recent Soviet invasion of Czechoslovakia. Her protest was repeated when she accepted her medal for her floor exercise routine when the judges changed the preliminary scores of the Soviet Larisa Petrik to tie with Čáslavská.