Complex sentence: On October 1,2005 the towns of Nima and Yunotsu, both from Nima District, were merged into Ōda, and Nima District was dissolved as a result of this merger.
Split into simpler sentences: On October 1,2005, the towns of Nima and Yunotsu (both from Nima District) were merged into Ōda. Therefore, Nima District was dissolved as a result of this merger.