Complex sentence: During the 2013 Mediterranean Games, the arena hosted taekwondo competitions on June 21-23 and karate competitions between 28 June and 29 June while the training activities of the related sports branches took place also at the sports hall.
Split into simpler sentences: During the 2013 Mediterranean Games, the arena hosted taekwondo competitions on June 21-23 and karate competitions between 28 June and 29 June. The training activities of the related sports branches took place also at the sports hall.