Complex sentence: In August 2013, Gorbanevskaya participated in a rally in Moscow to commemorate the forty-fifth anniversary of the invasion of Czechoslovakia; the rally was quickly dissolved by police, and ten participants (excluding Gorbanevskaya) were taken into custody.
Split into simpler sentences: In August 2013, Gorbanevskaya participated in a rally in Moscow to commemorate the forty-fifth anniversary of the invasion of Czechoslovakia. The rally was quickly dispersed by police, and ten participants (excluding Gorbanevskaya) were taken into custody.