Complex sentence: According to some sources the first such round up was held in 1955, while others put the date of the first event in the 1960s However both agree that the first modern event was held on a modest scale in the Tha Tum subdistrict of Surin Province.
Split into simpler sentences: According to some sources the first such round-up was held in 1955, while others put the date of the first event in the 1960s. Either way, the first modern event was held on a modest scale in the Tha Tum subdistrict of Surin Province.