Complex sentence: South Korean group TVXQ performed at the stadium on 17 and 18 August 2013, as part of their Tohoshinki Live Tour 2013 Time for both concerts was estimated at 140,000.
Split into simpler sentences: South Korean group TVXQ performed at the stadium on 17 and 18 August 2013, as part of their Tohoshinki Live Tour 2013 Time. Attendance for both concerts was estimated at 140,000.