Complex sentence: Stone tools have been widely found in Kanchanaburi, Ubon Ratchathani, Nakhon Si Thammarat, Lopburi etc. Many prehistoric cave-paintings have also been found in these regions, dating back 10,000 years.
Split into simpler sentences: Stone tools have been widely found in Kanchanaburi, Ubon Ratchathani, Nakhon Si Thammarat, and Lopburi. Prehistoric cave paintings have also been found in these regions, dating back 10,000 years.