Complex sentence: Dudkina and the rest of the Russian Group returned to competition at the 2013 Moscow Grand Prix where they won the all-around, at the Thiais Grand Prix they also won the all-around gold medal as well as in the event finals.
Split into simpler sentences: Dudkina and the rest of the Russian group returned to competition at the 2013 Moscow Grand Prix where they won the all-around. At the Thiais Grand Prix they also won the all-around gold medal as well as in the event finals.